AtriCure Inc NASDAQ:ATRC Historical Prices

Below are the 4704 trading days of historical prices for ATRC.

#	Exchange	Symbol	Date	Open	High	Low	Close
4704	NASDAQ	ATRC	Fri, Apr 19, 2024	23.30	23.43	22.87	23.20
4703	NASDAQ	ATRC	Thu, Apr 18, 2024	23.37	23.69	22.87	23.39
4702	NASDAQ	ATRC	Wed, Apr 17, 2024	23.19	24.01	23.14	23.45
4701	NASDAQ	ATRC	Tue, Apr 16, 2024	22.75	23.35	22.42	23.10
4700	NASDAQ	ATRC	Mon, Apr 15, 2024	24.35	24.52	22.48	22.90
4699	NASDAQ	ATRC	Fri, Apr 12, 2024	24.96	24.97	23.71	24.09
4698	NASDAQ	ATRC	Thu, Apr 11, 2024	26.09	26.27	25.20	25.31
4697	NASDAQ	ATRC	Wed, Apr 10, 2024	26.59	27.25	25.76	25.90
4696	NASDAQ	ATRC	Tue, Apr 9, 2024	26.63	27.63	26.50	27.61
4695	NASDAQ	ATRC	Mon, Apr 8, 2024	26.41	26.68	26.12	26.54
4694	NASDAQ	ATRC	Fri, Apr 5, 2024	26.07	26.55	25.95	26.26
4693	NASDAQ	ATRC	Thu, Apr 4, 2024	26.80	27.06	25.83	26.15
4692	NASDAQ	ATRC	Wed, Apr 3, 2024	26.85	26.96	26.15	26.48
4691	NASDAQ	ATRC	Tue, Apr 2, 2024	28.65	29.06	26.92	27.21
4690	NASDAQ	ATRC	Mon, Apr 1, 2024	30.39	30.39	28.77	29.09
4689	NASDAQ	ATRC	Thu, Mar 28, 2024	30.00	30.58	29.61	30.42
4688	NASDAQ	ATRC	Wed, Mar 27, 2024	29.54	30.47	29.09	30.14
4687	NASDAQ	ATRC	Tue, Mar 26, 2024	28.54	29.15	28.07	29.09
4686	NASDAQ	ATRC	Mon, Mar 25, 2024	28.62	29.13	27.92	28.21
4685	NASDAQ	ATRC	Fri, Mar 22, 2024	29.91	29.91	28.21	28.47
4684	NASDAQ	ATRC	Thu, Mar 21, 2024	30.67	31.03	29.66	29.73
4683	NASDAQ	ATRC	Wed, Mar 20, 2024	31.26	31.26	28.66	30.47
4682	NASDAQ	ATRC	Tue, Mar 19, 2024	31.69	32.08	31.47	31.51
4681	NASDAQ	ATRC	Mon, Mar 18, 2024	32.16	32.53	31.49	31.94
4680	NASDAQ	ATRC	Fri, Mar 15, 2024	32.26	32.66	31.38	32.14
4679	NASDAQ	ATRC	Thu, Mar 14, 2024	33.82	33.88	32.42	32.52
4678	NASDAQ	ATRC	Wed, Mar 13, 2024	34.63	35.04	33.68	33.99
4677	NASDAQ	ATRC	Tue, Mar 12, 2024	36.72	36.83	34.61	34.95
4676	NASDAQ	ATRC	Mon, Mar 11, 2024	36.00	37.31	35.59	36.92
4675	NASDAQ	ATRC	Fri, Mar 8, 2024	37.45	38.12	36.14	36.15
4674	NASDAQ	ATRC	Thu, Mar 7, 2024	38.06	39.05	37.09	37.17
4673	NASDAQ	ATRC	Wed, Mar 6, 2024	38.00	38.65	37.55	37.76
4672	NASDAQ	ATRC	Tue, Mar 5, 2024	37.36	37.86	36.57	37.78
4671	NASDAQ	ATRC	Mon, Mar 4, 2024	36.28	37.56	35.85	37.52
4670	NASDAQ	ATRC	Fri, Mar 1, 2024	35.01	36.32	34.64	36.28
4669	NASDAQ	ATRC	Thu, Feb 29, 2024	34.72	35.26	34.49	34.97
4668	NASDAQ	ATRC	Wed, Feb 28, 2024	33.80	34.15	33.51	33.96
4667	NASDAQ	ATRC	Tue, Feb 27, 2024	33.12	35.10	33.08	34.19
4666	NASDAQ	ATRC	Mon, Feb 26, 2024	33.32	33.73	33.00	33.14
4665	NASDAQ	ATRC	Fri, Feb 23, 2024	33.83	34.00	32.91	33.56
4664	NASDAQ	ATRC	Thu, Feb 22, 2024	32.89	34.51	32.89	34.00
4663	NASDAQ	ATRC	Wed, Feb 21, 2024	32.83	33.11	32.16	33.03
4662	NASDAQ	ATRC	Tue, Feb 20, 2024	32.37	33.46	32.29	33.01
4661	NASDAQ	ATRC	Fri, Feb 16, 2024	34.15	34.38	29.68	32.72
4660	NASDAQ	ATRC	Thu, Feb 15, 2024	32.93	34.32	32.50	34.21
4659	NASDAQ	ATRC	Wed, Feb 14, 2024	32.09	32.57	31.76	32.54
4658	NASDAQ	ATRC	Tue, Feb 13, 2024	32.04	32.54	31.48	31.71
4657	NASDAQ	ATRC	Mon, Feb 12, 2024	32.88	33.65	32.41	33.52
4656	NASDAQ	ATRC	Fri, Feb 9, 2024	32.37	32.95	32.15	32.92
4655	NASDAQ	ATRC	Thu, Feb 8, 2024	32.83	32.83	30.74	32.39
4654	NASDAQ	ATRC	Wed, Feb 7, 2024	33.17	33.53	32.85	33.01
4653	NASDAQ	ATRC	Tue, Feb 6, 2024	32.91	33.40	32.84	33.17
4652	NASDAQ	ATRC	Mon, Feb 5, 2024	32.97	33.74	32.86	33.08
4651	NASDAQ	ATRC	Fri, Feb 2, 2024	33.09	33.78	32.57	33.30
4650	NASDAQ	ATRC	Thu, Feb 1, 2024	34.15	34.47	33.45	33.68
4649	NASDAQ	ATRC	Wed, Jan 31, 2024	34.05	35.84	33.92	34.06
4648	NASDAQ	ATRC	Tue, Jan 30, 2024	33.99	34.49	33.55	33.92
4647	NASDAQ	ATRC	Mon, Jan 29, 2024	33.13	34.59	33.06	34.20
4646	NASDAQ	ATRC	Fri, Jan 26, 2024	33.79	34.07	32.87	33.25
4645	NASDAQ	ATRC	Thu, Jan 25, 2024	34.23	34.23	33.11	33.50
4644	NASDAQ	ATRC	Wed, Jan 24, 2024	34.41	34.44	33.50	33.58
4643	NASDAQ	ATRC	Tue, Jan 23, 2024	34.77	35.48	33.62	34.00
4642	NASDAQ	ATRC	Mon, Jan 22, 2024	34.28	34.97	33.84	34.28
4641	NASDAQ	ATRC	Fri, Jan 19, 2024	33.12	33.62	32.30	33.52
4640	NASDAQ	ATRC	Thu, Jan 18, 2024	33.61	33.61	32.44	33.00
4639	NASDAQ	ATRC	Wed, Jan 17, 2024	33.34	33.59	32.60	33.41
4638	NASDAQ	ATRC	Tue, Jan 16, 2024	34.48	34.94	33.73	33.91
4637	NASDAQ	ATRC	Fri, Jan 12, 2024	35.46	35.81	34.65	34.99
4636	NASDAQ	ATRC	Thu, Jan 11, 2024	35.14	35.52	34.37	34.98
4635	NASDAQ	ATRC	Wed, Jan 10, 2024	34.19	35.49	34.13	35.35
4634	NASDAQ	ATRC	Tue, Jan 9, 2024	34.23	35.61	33.88	34.14
4633	NASDAQ	ATRC	Mon, Jan 8, 2024	35.79	36.13	33.60	35.03
4632	NASDAQ	ATRC	Fri, Jan 5, 2024	32.52	33.31	32.17	33.03
4631	NASDAQ	ATRC	Thu, Jan 4, 2024	33.77	33.77	32.41	32.88
4630	NASDAQ	ATRC	Wed, Jan 3, 2024	35.07	35.10	33.14	33.70
4629	NASDAQ	ATRC	Tue, Jan 2, 2024	35.41	36.34	34.94	35.32
4628	NASDAQ	ATRC	Fri, Dec 29, 2023	36.63	36.82	35.50	35.69
4627	NASDAQ	ATRC	Thu, Dec 28, 2023	36.90	37.40	36.60	36.73
4626	NASDAQ	ATRC	Wed, Dec 27, 2023	37.19	37.82	36.64	37.10
4625	NASDAQ	ATRC	Tue, Dec 26, 2023	37.31	37.72	36.55	37.31
4624	NASDAQ	ATRC	Fri, Dec 22, 2023	36.15	37.21	35.93	37.10
4623	NASDAQ	ATRC	Thu, Dec 21, 2023	35.20	36.04	34.94	35.95
4622	NASDAQ	ATRC	Wed, Dec 20, 2023	35.87	36.28	34.42	34.48
4621	NASDAQ	ATRC	Tue, Dec 19, 2023	35.56	36.61	35.14	35.87
4620	NASDAQ	ATRC	Mon, Dec 18, 2023	36.10	36.40	35.22	35.27
4619	NASDAQ	ATRC	Fri, Dec 15, 2023	36.59	36.90	34.84	35.66
4618	NASDAQ	ATRC	Thu, Dec 14, 2023	35.54	36.84	35.07	36.40
4617	NASDAQ	ATRC	Wed, Dec 13, 2023	34.23	35.82	33.40	34.77
4616	NASDAQ	ATRC	Tue, Dec 12, 2023	33.47	34.34	32.50	34.20
4615	NASDAQ	ATRC	Mon, Dec 11, 2023	34.15	34.43	33.58	33.66
4614	NASDAQ	ATRC	Fri, Dec 8, 2023	33.43	34.46	32.95	34.14
4613	NASDAQ	ATRC	Thu, Dec 7, 2023	32.98	33.83	32.45	33.44
4612	NASDAQ	ATRC	Wed, Dec 6, 2023	35.14	35.19	32.87	32.99
4611	NASDAQ	ATRC	Tue, Dec 5, 2023	36.28	36.28	33.51	34.80
4610	NASDAQ	ATRC	Mon, Dec 4, 2023	36.70	37.30	35.70	36.48
4609	NASDAQ	ATRC	Fri, Dec 1, 2023	35.38	37.63	34.91	36.57
4608	NASDAQ	ATRC	Thu, Nov 30, 2023	35.50	35.72	32.89	35.48
4607	NASDAQ	ATRC	Wed, Nov 29, 2023	37.00	37.66	35.08	35.49
4606	NASDAQ	ATRC	Tue, Nov 28, 2023	41.63	42.99	32.27	36.70
4605	NASDAQ	ATRC	Mon, Nov 27, 2023	41.80	42.43	41.30	42.00
4604	NASDAQ	ATRC	Fri, Nov 24, 2023	41.49	42.79	41.01	42.08
4603	NASDAQ	ATRC	Wed, Nov 22, 2023	42.26	43.00	41.66	41.80
4602	NASDAQ	ATRC	Tue, Nov 21, 2023	41.66	42.09	40.51	41.70
4601	NASDAQ	ATRC	Mon, Nov 20, 2023	41.76	42.07	41.20	41.94
4600	NASDAQ	ATRC	Fri, Nov 17, 2023	42.10	42.60	41.21	41.50
4599	NASDAQ	ATRC	Thu, Nov 16, 2023	42.47	42.93	41.73	41.93
4598	NASDAQ	ATRC	Wed, Nov 15, 2023	40.61	42.99	40.24	42.53
4597	NASDAQ	ATRC	Tue, Nov 14, 2023	38.20	40.63	38.20	40.62
4596	NASDAQ	ATRC	Mon, Nov 13, 2023	35.88	37.50	35.24	36.89
4595	NASDAQ	ATRC	Fri, Nov 10, 2023	35.55	35.55	34.27	35.07
4594	NASDAQ	ATRC	Thu, Nov 9, 2023	37.04	37.45	34.99	35.47
4593	NASDAQ	ATRC	Wed, Nov 8, 2023	37.71	37.71	36.44	37.04
4592	NASDAQ	ATRC	Tue, Nov 7, 2023	37.78	37.99	37.21	37.48
4591	NASDAQ	ATRC	Mon, Nov 6, 2023	36.98	38.64	36.92	37.86
4590	NASDAQ	ATRC	Fri, Nov 3, 2023	37.38	37.54	36.07	36.98
4589	NASDAQ	ATRC	Thu, Nov 2, 2023	37.93	38.77	36.02	36.58
4588	NASDAQ	ATRC	Wed, Nov 1, 2023	34.43	35.37	33.87	35.01
4587	NASDAQ	ATRC	Tue, Oct 31, 2023	33.80	35.15	33.55	34.64
4586	NASDAQ	ATRC	Mon, Oct 30, 2023	33.74	34.27	33.13	33.52
4585	NASDAQ	ATRC	Fri, Oct 27, 2023	33.94	34.00	32.90	33.34
4584	NASDAQ	ATRC	Thu, Oct 26, 2023	34.52	34.68	33.45	33.89
4583	NASDAQ	ATRC	Wed, Oct 25, 2023	35.51	35.51	34.20	34.33
4582	NASDAQ	ATRC	Tue, Oct 24, 2023	35.78	36.37	35.62	35.92
4581	NASDAQ	ATRC	Mon, Oct 23, 2023	36.27	37.30	35.16	35.42
4580	NASDAQ	ATRC	Fri, Oct 20, 2023	35.35	36.30	35.03	35.56
4579	NASDAQ	ATRC	Thu, Oct 19, 2023	35.97	36.30	35.02	35.29
4578	NASDAQ	ATRC	Wed, Oct 18, 2023	35.52	36.27	34.90	35.87
4577	NASDAQ	ATRC	Tue, Oct 17, 2023	36.40	37.60	35.39	35.56
4576	NASDAQ	ATRC	Mon, Oct 16, 2023	36.92	37.14	36.34	36.89
4575	NASDAQ	ATRC	Fri, Oct 13, 2023	36.49	37.05	35.98	36.59
4574	NASDAQ	ATRC	Thu, Oct 12, 2023	38.76	40.52	36.22	36.46
4573	NASDAQ	ATRC	Wed, Oct 11, 2023	40.89	40.89	37.97	38.76
4572	NASDAQ	ATRC	Tue, Oct 10, 2023	40.21	41.76	40.20	40.92
4571	NASDAQ	ATRC	Mon, Oct 9, 2023	41.39	41.78	40.34	40.42
4570	NASDAQ	ATRC	Fri, Oct 6, 2023	40.83	42.08	40.29	41.79
4569	NASDAQ	ATRC	Thu, Oct 5, 2023	41.13	42.03	40.23	41.08
4568	NASDAQ	ATRC	Wed, Oct 4, 2023	41.81	42.08	40.91	41.05
4567	NASDAQ	ATRC	Tue, Oct 3, 2023	43.18	43.54	41.72	41.81
4566	NASDAQ	ATRC	Mon, Oct 2, 2023	43.46	43.50	42.25	43.25
4565	NASDAQ	ATRC	Fri, Sep 29, 2023	44.52	44.64	43.54	43.80
4564	NASDAQ	ATRC	Thu, Sep 28, 2023	43.19	44.23	42.99	43.91
4563	NASDAQ	ATRC	Wed, Sep 27, 2023	42.48	43.28	42.08	42.94
4562	NASDAQ	ATRC	Tue, Sep 26, 2023	41.39	42.52	41.26	42.35
4561	NASDAQ	ATRC	Mon, Sep 25, 2023	40.99	41.81	40.84	41.70
4560	NASDAQ	ATRC	Fri, Sep 22, 2023	41.71	42.10	40.89	41.12
4559	NASDAQ	ATRC	Thu, Sep 21, 2023	41.62	42.18	41.31	41.74
4558	NASDAQ	ATRC	Wed, Sep 20, 2023	43.68	43.71	41.71	41.73
4557	NASDAQ	ATRC	Tue, Sep 19, 2023	43.30	43.68	42.63	43.41
4556	NASDAQ	ATRC	Mon, Sep 18, 2023	44.63	44.63	43.39	43.46
4555	NASDAQ	ATRC	Fri, Sep 15, 2023	44.71	44.85	43.61	44.65
4554	NASDAQ	ATRC	Thu, Sep 14, 2023	44.36	44.92	43.86	44.38
4553	NASDAQ	ATRC	Wed, Sep 13, 2023	43.39	44.57	42.68	44.22
4552	NASDAQ	ATRC	Tue, Sep 12, 2023	43.00	43.63	42.39	43.45
4551	NASDAQ	ATRC	Mon, Sep 11, 2023	43.09	43.09	43.09	43.09
4550	NASDAQ	ATRC	Fri, Sep 8, 2023	43.55	43.77	41.53	41.61
4549	NASDAQ	ATRC	Thu, Sep 7, 2023	44.78	44.78	42.89	43.51
4548	NASDAQ	ATRC	Wed, Sep 6, 2023	45.48	45.80	44.82	44.85
4547	NASDAQ	ATRC	Tue, Sep 5, 2023	45.35	45.59	44.66	45.23
4546	NASDAQ	ATRC	Fri, Sep 1, 2023	45.53	46.22	45.16	45.71
4545	NASDAQ	ATRC	Thu, Aug 31, 2023	46.09	46.49	45.13	45.15
4544	NASDAQ	ATRC	Wed, Aug 30, 2023	46.55	47.13	46.04	46.09
4543	NASDAQ	ATRC	Tue, Aug 29, 2023	46.33	46.58	45.84	46.48
4542	NASDAQ	ATRC	Mon, Aug 28, 2023	46.25	46.62	45.42	46.33
4541	NASDAQ	ATRC	Fri, Aug 25, 2023	45.72	46.23	45.00	46.00
4540	NASDAQ	ATRC	Thu, Aug 24, 2023	46.73	46.74	45.37	45.56
4539	NASDAQ	ATRC	Wed, Aug 23, 2023	48.19	48.27	46.93	46.97
4538	NASDAQ	ATRC	Tue, Aug 22, 2023	47.40	48.56	47.29	48.09
4537	NASDAQ	ATRC	Mon, Aug 21, 2023	46.43	47.66	46.21	47.19
4536	NASDAQ	ATRC	Fri, Aug 18, 2023	47.63	48.26	46.54	46.60
4535	NASDAQ	ATRC	Thu, Aug 17, 2023	49.69	50.23	47.81	47.96
4534	NASDAQ	ATRC	Wed, Aug 16, 2023	51.94	52.12	49.49	49.65
4533	NASDAQ	ATRC	Tue, Aug 15, 2023	51.50	52.34	51.31	51.90
4532	NASDAQ	ATRC	Mon, Aug 14, 2023	51.70	52.19	51.18	51.68
4531	NASDAQ	ATRC	Fri, Aug 11, 2023	50.88	52.04	50.88	51.72
4530	NASDAQ	ATRC	Thu, Aug 10, 2023	51.70	52.00	51.03	51.28
4529	NASDAQ	ATRC	Wed, Aug 9, 2023	52.30	52.73	51.64	51.86
4528	NASDAQ	ATRC	Tue, Aug 8, 2023	54.67	54.67	52.44	52.44
4527	NASDAQ	ATRC	Mon, Aug 7, 2023	57.22	57.22	54.91	55.06
4526	NASDAQ	ATRC	Fri, Aug 4, 2023	56.69	57.40	56.47	57.23
4525	NASDAQ	ATRC	Thu, Aug 3, 2023	56.63	57.56	56.21	56.86
4524	NASDAQ	ATRC	Wed, Aug 2, 2023	55.83	57.77	55.16	56.90
4523	NASDAQ	ATRC	Tue, Aug 1, 2023	55.31	56.31	55.03	56.25
4522	NASDAQ	ATRC	Mon, Jul 31, 2023	55.29	55.60	54.69	55.35
4521	NASDAQ	ATRC	Fri, Jul 28, 2023	55.05	55.57	54.51	55.35
4520	NASDAQ	ATRC	Thu, Jul 27, 2023	57.82	58.00	54.45	54.74
4519	NASDAQ	ATRC	Wed, Jul 26, 2023	56.75	59.61	54.59	57.73
4518	NASDAQ	ATRC	Tue, Jul 25, 2023	52.97	54.15	52.91	53.19
4517	NASDAQ	ATRC	Mon, Jul 24, 2023	53.93	54.16	52.39	53.34
4516	NASDAQ	ATRC	Fri, Jul 21, 2023	54.49	54.75	53.47	54.12
4515	NASDAQ	ATRC	Thu, Jul 20, 2023	53.50	54.59	53.08	54.31
4514	NASDAQ	ATRC	Wed, Jul 19, 2023	54.36	54.49	53.28	53.40
4513	NASDAQ	ATRC	Tue, Jul 18, 2023	53.44	54.69	52.81	54.27
4512	NASDAQ	ATRC	Mon, Jul 17, 2023	52.88	53.97	52.36	53.30
4511	NASDAQ	ATRC	Fri, Jul 14, 2023	53.21	53.38	52.17	52.74
4510	NASDAQ	ATRC	Thu, Jul 13, 2023	52.36	53.70	52.30	53.39
4509	NASDAQ	ATRC	Wed, Jul 12, 2023	51.08	52.35	50.87	52.01
4508	NASDAQ	ATRC	Tue, Jul 11, 2023	49.85	50.25	48.96	50.01
4507	NASDAQ	ATRC	Mon, Jul 10, 2023	48.25	50.29	48.25	49.77
4506	NASDAQ	ATRC	Fri, Jul 7, 2023	48.55	49.28	48.02	48.34
4505	NASDAQ	ATRC	Thu, Jul 6, 2023	47.98	48.74	47.57	48.44
4504	NASDAQ	ATRC	Wed, Jul 5, 2023	48.72	49.29	48.30	48.61
4503	NASDAQ	ATRC	Mon, Jul 3, 2023	48.78	49.18	48.31	48.92
4502	NASDAQ	ATRC	Fri, Jun 30, 2023	49.97	50.44	49.33	49.36
4501	NASDAQ	ATRC	Thu, Jun 29, 2023	49.47	50.72	48.87	49.60
4500	NASDAQ	ATRC	Wed, Jun 28, 2023	48.69	49.85	48.48	49.39
4499	NASDAQ	ATRC	Tue, Jun 27, 2023	48.87	49.08	47.60	48.57
4498	NASDAQ	ATRC	Mon, Jun 26, 2023	47.68	48.84	47.52	48.74
4497	NASDAQ	ATRC	Fri, Jun 23, 2023	48.60	48.94	47.64	47.87
4496	NASDAQ	ATRC	Thu, Jun 22, 2023	48.76	49.59	48.30	48.99
4495	NASDAQ	ATRC	Wed, Jun 21, 2023	48.65	48.86	47.63	48.78
4494	NASDAQ	ATRC	Tue, Jun 20, 2023	47.58	49.27	47.26	48.87
4493	NASDAQ	ATRC	Fri, Jun 16, 2023	49.90	50.00	47.97	48.11
4492	NASDAQ	ATRC	Thu, Jun 15, 2023	49.00	49.69	48.72	49.12
4491	NASDAQ	ATRC	Wed, Jun 14, 2023	48.60	49.60	48.06	49.08
4490	NASDAQ	ATRC	Tue, Jun 13, 2023	47.34	48.44	47.34	48.20
4489	NASDAQ	ATRC	Mon, Jun 12, 2023	47.03	47.64	46.67	47.23
4488	NASDAQ	ATRC	Fri, Jun 9, 2023	47.92	48.22	47.12	47.15
4487	NASDAQ	ATRC	Thu, Jun 8, 2023	48.63	48.81	47.09	47.86
4486	NASDAQ	ATRC	Wed, Jun 7, 2023	48.56	49.41	47.81	48.82
4485	NASDAQ	ATRC	Tue, Jun 6, 2023	47.03	48.64	46.90	48.39
4484	NASDAQ	ATRC	Mon, Jun 5, 2023	46.64	47.80	46.34	47.08
4483	NASDAQ	ATRC	Fri, Jun 2, 2023	46.31	47.10	45.85	46.93
4482	NASDAQ	ATRC	Thu, Jun 1, 2023	44.99	45.89	44.26	45.78
4481	NASDAQ	ATRC	Wed, May 31, 2023	45.78	46.31	43.64	44.97
4480	NASDAQ	ATRC	Tue, May 30, 2023	46.86	47.24	45.61	45.71
4479	NASDAQ	ATRC	Fri, May 26, 2023	47.01	47.66	46.58	46.91
4478	NASDAQ	ATRC	Thu, May 25, 2023	47.66	47.75	46.59	47.07
4477	NASDAQ	ATRC	Wed, May 24, 2023	47.95	48.22	47.35	47.71
4476	NASDAQ	ATRC	Tue, May 23, 2023	49.17	50.45	48.00	48.13
4475	NASDAQ	ATRC	Mon, May 22, 2023	48.24	49.56	48.24	49.32
4474	NASDAQ	ATRC	Fri, May 19, 2023	49.36	50.85	48.14	48.29
4473	NASDAQ	ATRC	Thu, May 18, 2023	48.38	49.41	47.81	48.89
4472	NASDAQ	ATRC	Wed, May 17, 2023	49.21	49.65	47.82	48.62
4471	NASDAQ	ATRC	Tue, May 16, 2023	47.52	49.23	46.95	49.00
4470	NASDAQ	ATRC	Mon, May 15, 2023	48.25	48.56	47.37	47.95
4469	NASDAQ	ATRC	Fri, May 12, 2023	48.16	48.19	47.18	48.08
4468	NASDAQ	ATRC	Thu, May 11, 2023	48.77	48.87	47.99	48.16
4467	NASDAQ	ATRC	Wed, May 10, 2023	48.65	49.61	47.89	49.01
4466	NASDAQ	ATRC	Tue, May 9, 2023	47.35	48.27	46.99	47.92
4465	NASDAQ	ATRC	Mon, May 8, 2023	48.22	48.24	45.48	47.76
4464	NASDAQ	ATRC	Fri, May 5, 2023	47.75	48.39	46.16	48.34
4463	NASDAQ	ATRC	Thu, May 4, 2023	47.98	48.54	47.00	47.13
4462	NASDAQ	ATRC	Wed, May 3, 2023	47.12	49.34	45.96	48.33
4461	NASDAQ	ATRC	Tue, May 2, 2023	44.68	44.72	43.09	43.94
4460	NASDAQ	ATRC	Mon, May 1, 2023	44.31	45.73	44.30	45.12
4459	NASDAQ	ATRC	Fri, Apr 28, 2023	42.50	44.06	42.38	43.99
4458	NASDAQ	ATRC	Thu, Apr 27, 2023	42.33	43.08	41.95	42.53
4457	NASDAQ	ATRC	Wed, Apr 26, 2023	41.54	42.34	41.35	42.25
4456	NASDAQ	ATRC	Tue, Apr 25, 2023	41.06	42.21	41.01	41.79
4455	NASDAQ	ATRC	Mon, Apr 24, 2023	42.09	42.15	41.28	41.39
4454	NASDAQ	ATRC	Fri, Apr 21, 2023	42.20	42.44	41.60	41.95
4453	NASDAQ	ATRC	Thu, Apr 20, 2023	41.93	42.62	41.40	41.88
4452	NASDAQ	ATRC	Wed, Apr 19, 2023	41.59	42.31	41.20	42.06
4451	NASDAQ	ATRC	Tue, Apr 18, 2023	42.99	42.99	41.38	41.67
4450	NASDAQ	ATRC	Mon, Apr 17, 2023	42.61	42.90	42.16	42.74
4449	NASDAQ	ATRC	Fri, Apr 14, 2023	43.21	43.59	42.15	42.45
4448	NASDAQ	ATRC	Thu, Apr 13, 2023	42.51	43.31	42.21	43.29
4447	NASDAQ	ATRC	Wed, Apr 12, 2023	42.25	42.96	41.62	42.31
4446	NASDAQ	ATRC	Tue, Apr 11, 2023	41.15	41.89	41.15	41.75
4445	NASDAQ	ATRC	Mon, Apr 10, 2023	40.28	41.16	39.03	41.12
4444	NASDAQ	ATRC	Thu, Apr 6, 2023	41.22	41.43	40.20	40.44
4443	NASDAQ	ATRC	Wed, Apr 5, 2023	41.07	41.60	40.63	41.03
4442	NASDAQ	ATRC	Tue, Apr 4, 2023	41.70	42.03	41.00	41.06
4441	NASDAQ	ATRC	Mon, Apr 3, 2023	41.45	42.37	41.05	41.63
4440	NASDAQ	ATRC	Fri, Mar 31, 2023	41.47	42.18	41.34	41.45
4439	NASDAQ	ATRC	Thu, Mar 30, 2023	41.18	41.72	40.69	41.16
4438	NASDAQ	ATRC	Wed, Mar 29, 2023	40.94	41.29	40.26	40.87
4437	NASDAQ	ATRC	Tue, Mar 28, 2023	40.39	41.03	40.02	40.64
4436	NASDAQ	ATRC	Mon, Mar 27, 2023	41.14	41.43	40.18	40.45
4435	NASDAQ	ATRC	Fri, Mar 24, 2023	37.69	41.06	37.52	40.83
4434	NASDAQ	ATRC	Thu, Mar 23, 2023	39.14	39.59	37.90	37.98
4433	NASDAQ	ATRC	Wed, Mar 22, 2023	39.40	39.98	38.69	38.76
4432	NASDAQ	ATRC	Tue, Mar 21, 2023	39.35	40.14	39.12	39.32
4431	NASDAQ	ATRC	Mon, Mar 20, 2023	39.35	39.59	38.28	38.99
4430	NASDAQ	ATRC	Fri, Mar 17, 2023	39.39	39.99	38.73	39.20
4429	NASDAQ	ATRC	Thu, Mar 16, 2023	38.73	39.84	38.62	39.35
4428	NASDAQ	ATRC	Wed, Mar 15, 2023	37.83	39.22	37.26	39.14
4427	NASDAQ	ATRC	Tue, Mar 14, 2023	38.32	38.82	37.26	38.71
4426	NASDAQ	ATRC	Mon, Mar 13, 2023	35.70	37.87	35.20	37.26
4425	NASDAQ	ATRC	Fri, Mar 10, 2023	37.19	37.19	35.29	35.87
4424	NASDAQ	ATRC	Thu, Mar 9, 2023	38.13	38.74	37.40	37.46
4423	NASDAQ	ATRC	Wed, Mar 8, 2023	38.06	38.45	37.65	38.00
4422	NASDAQ	ATRC	Tue, Mar 7, 2023	38.66	39.75	37.40	37.89
4421	NASDAQ	ATRC	Mon, Mar 6, 2023	40.10	40.10	38.07	38.62
4420	NASDAQ	ATRC	Fri, Mar 3, 2023	39.40	39.97	39.20	39.93
4419	NASDAQ	ATRC	Thu, Mar 2, 2023	38.26	39.26	37.91	39.17
4418	NASDAQ	ATRC	Wed, Mar 1, 2023	38.43	39.29	38.25	38.81
4417	NASDAQ	ATRC	Tue, Feb 28, 2023	39.38	40.08	38.37	38.50
4416	NASDAQ	ATRC	Mon, Feb 27, 2023	40.17	40.50	39.32	39.44
4415	NASDAQ	ATRC	Fri, Feb 24, 2023	41.17	41.78	39.75	39.81
4414	NASDAQ	ATRC	Thu, Feb 23, 2023	42.77	42.77	40.56	42.01
4413	NASDAQ	ATRC	Wed, Feb 22, 2023	39.71	43.10	39.03	42.48
4412	NASDAQ	ATRC	Tue, Feb 21, 2023	39.50	40.23	38.21	39.24
4411	NASDAQ	ATRC	Fri, Feb 17, 2023	40.84	41.38	39.97	40.34
4410	NASDAQ	ATRC	Thu, Feb 16, 2023	41.60	43.29	40.72	40.80
4409	NASDAQ	ATRC	Wed, Feb 15, 2023	42.89	43.54	42.35	42.40
4408	NASDAQ	ATRC	Tue, Feb 14, 2023	42.90	43.75	42.52	43.14
4407	NASDAQ	ATRC	Mon, Feb 13, 2023	43.25	43.85	42.32	43.13
4406	NASDAQ	ATRC	Fri, Feb 10, 2023	42.53	43.21	42.13	43.11
4405	NASDAQ	ATRC	Thu, Feb 9, 2023	43.07	44.23	42.35	42.66
4404	NASDAQ	ATRC	Wed, Feb 8, 2023	44.04	44.51	42.50	42.75
4403	NASDAQ	ATRC	Tue, Feb 7, 2023	43.74	44.37	42.16	44.35
4402	NASDAQ	ATRC	Mon, Feb 6, 2023	47.41	47.41	44.06	44.09
4401	NASDAQ	ATRC	Fri, Feb 3, 2023	46.59	47.85	46.00	47.20
4400	NASDAQ	ATRC	Thu, Feb 2, 2023	44.82	47.25	44.78	47.22
4399	NASDAQ	ATRC	Wed, Feb 1, 2023	43.36	44.42	42.72	44.16
4398	NASDAQ	ATRC	Tue, Jan 31, 2023	43.86	45.26	43.12	43.28
4397	NASDAQ	ATRC	Mon, Jan 30, 2023	43.02	44.10	42.35	43.43
4396	NASDAQ	ATRC	Fri, Jan 27, 2023	43.07	43.50	42.59	43.30
4395	NASDAQ	ATRC	Thu, Jan 26, 2023	43.62	44.69	42.75	43.15
4394	NASDAQ	ATRC	Wed, Jan 25, 2023	41.76	43.07	41.46	43.07
4393	NASDAQ	ATRC	Tue, Jan 24, 2023	43.00	43.51	41.74	42.27
4392	NASDAQ	ATRC	Mon, Jan 23, 2023	42.50	43.16	41.65	43.11
4391	NASDAQ	ATRC	Fri, Jan 20, 2023	42.65	43.01	41.69	42.43
4390	NASDAQ	ATRC	Thu, Jan 19, 2023	41.94	42.36	40.77	42.07
4389	NASDAQ	ATRC	Wed, Jan 18, 2023	44.32	44.32	42.28	42.46
4388	NASDAQ	ATRC	Tue, Jan 17, 2023	43.12	43.89	42.63	43.34
4387	NASDAQ	ATRC	Fri, Jan 13, 2023	41.98	43.14	41.98	43.13
4386	NASDAQ	ATRC	Thu, Jan 12, 2023	42.21	42.25	40.72	42.14
4385	NASDAQ	ATRC	Wed, Jan 11, 2023	42.47	42.79	40.49	41.91
4384	NASDAQ	ATRC	Tue, Jan 10, 2023	43.79	44.82	42.18	42.34
4383	NASDAQ	ATRC	Mon, Jan 9, 2023	46.02	46.10	43.49	43.90
4382	NASDAQ	ATRC	Fri, Jan 6, 2023	45.34	46.40	44.11	45.72
4381	NASDAQ	ATRC	Thu, Jan 5, 2023	44.64	45.86	43.90	45.09
4380	NASDAQ	ATRC	Wed, Jan 4, 2023	45.36	46.39	44.55	45.08
4379	NASDAQ	ATRC	Tue, Jan 3, 2023	45.00	45.89	43.87	44.84
4378	NASDAQ	ATRC	Fri, Dec 30, 2022	43.85	44.58	42.96	44.38
4377	NASDAQ	ATRC	Thu, Dec 29, 2022	43.65	44.96	43.09	44.44
4376	NASDAQ	ATRC	Wed, Dec 28, 2022	42.61	43.67	42.28	43.11
4375	NASDAQ	ATRC	Tue, Dec 27, 2022	43.75	44.32	41.33	42.48
4374	NASDAQ	ATRC	Fri, Dec 23, 2022	44.05	44.44	43.21	43.69
4373	NASDAQ	ATRC	Thu, Dec 22, 2022	43.60	45.25	42.79	44.19
4372	NASDAQ	ATRC	Wed, Dec 21, 2022	44.39	45.49	43.72	43.92
4371	NASDAQ	ATRC	Tue, Dec 20, 2022	42.17	43.97	42.17	43.73
4370	NASDAQ	ATRC	Mon, Dec 19, 2022	41.70	42.75	40.73	42.53
4369	NASDAQ	ATRC	Fri, Dec 16, 2022	41.69	42.30	40.85	41.37
4368	NASDAQ	ATRC	Thu, Dec 15, 2022	43.34	43.75	42.04	42.47
4367	NASDAQ	ATRC	Wed, Dec 14, 2022	45.19	46.41	43.79	43.92
4366	NASDAQ	ATRC	Tue, Dec 13, 2022	44.68	45.42	43.87	45.30
4365	NASDAQ	ATRC	Mon, Dec 12, 2022	42.80	43.58	41.96	42.71
4364	NASDAQ	ATRC	Fri, Dec 9, 2022	43.71	43.94	42.51	42.54
4363	NASDAQ	ATRC	Thu, Dec 8, 2022	43.39	44.07	42.74	43.86
4362	NASDAQ	ATRC	Wed, Dec 7, 2022	42.34	44.49	41.63	43.05
4361	NASDAQ	ATRC	Tue, Dec 6, 2022	43.65	43.92	42.04	42.35
4360	NASDAQ	ATRC	Mon, Dec 5, 2022	45.00	45.00	43.30	43.65
4359	NASDAQ	ATRC	Fri, Dec 2, 2022	45.09	46.02	43.80	45.56
4358	NASDAQ	ATRC	Thu, Dec 1, 2022	45.85	46.18	44.13	45.96
4357	NASDAQ	ATRC	Wed, Nov 30, 2022	43.76	45.59	42.82	45.56
4356	NASDAQ	ATRC	Tue, Nov 29, 2022	43.73	44.87	43.37	43.48
4355	NASDAQ	ATRC	Mon, Nov 28, 2022	45.38	45.63	43.34	43.86
4354	NASDAQ	ATRC	Fri, Nov 25, 2022	45.12	45.88	45.01	45.83
4353	NASDAQ	ATRC	Wed, Nov 23, 2022	45.83	45.90	44.83	45.38
4352	NASDAQ	ATRC	Tue, Nov 22, 2022	46.17	46.48	43.52	45.70
4351	NASDAQ	ATRC	Mon, Nov 21, 2022	45.86	47.44	45.76	45.94
4350	NASDAQ	ATRC	Fri, Nov 18, 2022	46.23	47.22	45.02	46.08
4349	NASDAQ	ATRC	Thu, Nov 17, 2022	45.43	46.26	44.91	45.17
4348	NASDAQ	ATRC	Wed, Nov 16, 2022	47.10	49.60	45.76	46.52
4347	NASDAQ	ATRC	Tue, Nov 15, 2022	47.08	48.79	46.45	47.45
4346	NASDAQ	ATRC	Mon, Nov 14, 2022	44.87	46.14	44.29	46.07
4345	NASDAQ	ATRC	Fri, Nov 11, 2022	43.44	45.47	43.40	45.20
4344	NASDAQ	ATRC	Thu, Nov 10, 2022	41.34	43.47	40.66	43.02
4343	NASDAQ	ATRC	Wed, Nov 9, 2022	40.22	40.40	38.63	38.90
4342	NASDAQ	ATRC	Tue, Nov 8, 2022	40.50	40.81	39.01	40.64
4341	NASDAQ	ATRC	Mon, Nov 7, 2022	40.23	40.75	39.32	40.40
4340	NASDAQ	ATRC	Fri, Nov 4, 2022	42.16	42.16	38.63	39.65
4339	NASDAQ	ATRC	Thu, Nov 3, 2022	40.15	41.49	39.15	41.36
4338	NASDAQ	ATRC	Wed, Nov 2, 2022	41.78	42.62	39.65	40.35
4337	NASDAQ	ATRC	Tue, Nov 1, 2022	42.32	44.40	41.93	42.94
4336	NASDAQ	ATRC	Mon, Oct 31, 2022	41.59	42.75	41.54	42.12
4335	NASDAQ	ATRC	Fri, Oct 28, 2022	40.46	42.07	39.94	41.91
4334	NASDAQ	ATRC	Thu, Oct 27, 2022	41.97	42.01	40.34	40.51
4333	NASDAQ	ATRC	Wed, Oct 26, 2022	39.06	42.36	38.90	41.54
4332	NASDAQ	ATRC	Tue, Oct 25, 2022	36.83	39.02	36.83	38.79
4331	NASDAQ	ATRC	Mon, Oct 24, 2022	37.20	37.36	36.08	36.60
4330	NASDAQ	ATRC	Fri, Oct 21, 2022	36.62	36.91	35.49	36.73
4329	NASDAQ	ATRC	Thu, Oct 20, 2022	36.35	38.01	36.26	36.44
4328	NASDAQ	ATRC	Wed, Oct 19, 2022	37.07	37.24	35.45	36.41
4327	NASDAQ	ATRC	Tue, Oct 18, 2022	37.22	38.80	36.89	37.40
4326	NASDAQ	ATRC	Mon, Oct 17, 2022	33.98	36.56	33.98	36.17
4325	NASDAQ	ATRC	Fri, Oct 14, 2022	35.73	35.99	33.40	33.48
4324	NASDAQ	ATRC	Thu, Oct 13, 2022	33.09	35.45	32.51	35.14
4323	NASDAQ	ATRC	Wed, Oct 12, 2022	34.83	34.83	33.78	34.07
4322	NASDAQ	ATRC	Tue, Oct 11, 2022	35.98	36.29	34.35	34.86
4321	NASDAQ	ATRC	Mon, Oct 10, 2022	38.46	38.75	35.96	35.98
4320	NASDAQ	ATRC	Fri, Oct 7, 2022	39.02	39.30	37.91	38.35
4319	NASDAQ	ATRC	Thu, Oct 6, 2022	40.15	40.72	39.18	39.59
4318	NASDAQ	ATRC	Wed, Oct 5, 2022	39.68	40.35	38.60	40.16
4317	NASDAQ	ATRC	Tue, Oct 4, 2022	40.96	41.57	40.33	40.52
4316	NASDAQ	ATRC	Mon, Oct 3, 2022	39.44	40.35	38.91	40.01
4315	NASDAQ	ATRC	Fri, Sep 30, 2022	39.77	41.06	39.07	39.10
4314	NASDAQ	ATRC	Thu, Sep 29, 2022	39.00	39.88	38.89	39.54
4313	NASDAQ	ATRC	Wed, Sep 28, 2022	38.75	39.97	38.45	39.53
4312	NASDAQ	ATRC	Tue, Sep 27, 2022	39.42	39.65	37.81	38.25
4311	NASDAQ	ATRC	Mon, Sep 26, 2022	38.29	39.67	38.02	38.93
4310	NASDAQ	ATRC	Fri, Sep 23, 2022	41.26	41.73	38.35	38.56
4309	NASDAQ	ATRC	Thu, Sep 22, 2022	43.00	43.26	41.24	41.72
4308	NASDAQ	ATRC	Wed, Sep 21, 2022	43.92	44.26	42.81	42.97
4307	NASDAQ	ATRC	Tue, Sep 20, 2022	43.64	43.73	42.88	43.45
4306	NASDAQ	ATRC	Mon, Sep 19, 2022	44.50	44.56	42.91	44.19
4305	NASDAQ	ATRC	Fri, Sep 16, 2022	45.14	45.14	43.45	44.99
4304	NASDAQ	ATRC	Thu, Sep 15, 2022	45.90	47.27	45.70	45.90
4303	NASDAQ	ATRC	Wed, Sep 14, 2022	46.06	46.38	45.77	46.37
4302	NASDAQ	ATRC	Tue, Sep 13, 2022	45.20	46.76	45.20	46.40
4301	NASDAQ	ATRC	Mon, Sep 12, 2022	46.45	47.50	46.15	47.32
4300	NASDAQ	ATRC	Fri, Sep 9, 2022	45.58	47.03	45.18	46.45
4299	NASDAQ	ATRC	Thu, Sep 8, 2022	43.58	45.48	43.37	45.25
4298	NASDAQ	ATRC	Wed, Sep 7, 2022	42.83	44.20	42.83	44.07
4297	NASDAQ	ATRC	Tue, Sep 6, 2022	42.67	43.17	40.42	42.82
4296	NASDAQ	ATRC	Fri, Sep 2, 2022	43.39	43.74	42.37	42.82
4295	NASDAQ	ATRC	Thu, Sep 1, 2022	45.00	46.43	42.31	43.03
4294	NASDAQ	ATRC	Wed, Aug 31, 2022	46.27	47.11	45.53	45.62
4293	NASDAQ	ATRC	Tue, Aug 30, 2022	46.09	46.48	45.54	45.73
4292	NASDAQ	ATRC	Mon, Aug 29, 2022	46.35	46.83	45.12	45.86
4291	NASDAQ	ATRC	Fri, Aug 26, 2022	49.35	49.62	46.87	47.04
4290	NASDAQ	ATRC	Thu, Aug 25, 2022	48.99	49.97	48.69	49.35
4289	NASDAQ	ATRC	Wed, Aug 24, 2022	47.63	48.67	47.50	48.53
4288	NASDAQ	ATRC	Tue, Aug 23, 2022	48.43	48.43	46.66	47.55
4287	NASDAQ	ATRC	Mon, Aug 22, 2022	47.83	49.12	47.83	48.38
4286	NASDAQ	ATRC	Fri, Aug 19, 2022	50.10	50.26	47.66	48.62
4285	NASDAQ	ATRC	Thu, Aug 18, 2022	50.25	50.87	49.51	50.43
4284	NASDAQ	ATRC	Wed, Aug 17, 2022	52.00	52.48	49.93	50.55
4283	NASDAQ	ATRC	Tue, Aug 16, 2022	52.42	52.96	50.99	52.61
4282	NASDAQ	ATRC	Mon, Aug 15, 2022	51.79	52.92	50.76	52.62
4281	NASDAQ	ATRC	Fri, Aug 12, 2022	50.96	52.90	50.60	51.98
4280	NASDAQ	ATRC	Thu, Aug 11, 2022	51.20	52.48	50.53	50.73
4279	NASDAQ	ATRC	Wed, Aug 10, 2022	50.26	50.85	49.46	50.80
4278	NASDAQ	ATRC	Tue, Aug 9, 2022	51.08	51.21	48.63	48.92
4277	NASDAQ	ATRC	Mon, Aug 8, 2022	51.00	52.26	51.00	51.44
4276	NASDAQ	ATRC	Fri, Aug 5, 2022	48.00	51.06	47.52	50.94
4275	NASDAQ	ATRC	Thu, Aug 4, 2022	49.81	51.17	48.02	48.90
4274	NASDAQ	ATRC	Wed, Aug 3, 2022	49.59	50.14	46.66	49.38
4273	NASDAQ	ATRC	Tue, Aug 2, 2022	48.23	49.76	48.23	49.69
4272	NASDAQ	ATRC	Mon, Aug 1, 2022	48.59	50.02	48.25	48.85
4271	NASDAQ	ATRC	Fri, Jul 29, 2022	48.54	49.55	47.74	49.41
4270	NASDAQ	ATRC	Thu, Jul 28, 2022	48.42	49.07	46.55	48.75
4269	NASDAQ	ATRC	Wed, Jul 27, 2022	45.92	48.16	45.33	47.97
4268	NASDAQ	ATRC	Tue, Jul 26, 2022	44.69	45.88	44.14	45.28
4267	NASDAQ	ATRC	Mon, Jul 25, 2022	46.09	47.59	44.68	44.85
4266	NASDAQ	ATRC	Fri, Jul 22, 2022	47.82	48.64	45.35	46.08
4265	NASDAQ	ATRC	Thu, Jul 21, 2022	46.79	47.92	46.41	47.82
4264	NASDAQ	ATRC	Wed, Jul 20, 2022	44.30	46.95	44.30	46.91
4263	NASDAQ	ATRC	Tue, Jul 19, 2022	43.81	44.89	42.61	43.91
4262	NASDAQ	ATRC	Mon, Jul 18, 2022	43.99	44.78	43.11	43.29
4261	NASDAQ	ATRC	Fri, Jul 15, 2022	43.40	44.15	42.45	43.75
4260	NASDAQ	ATRC	Thu, Jul 14, 2022	42.31	44.13	41.63	42.46
4259	NASDAQ	ATRC	Wed, Jul 13, 2022	41.86	42.97	41.60	42.56
4258	NASDAQ	ATRC	Tue, Jul 12, 2022	42.54	42.82	41.58	42.70
4257	NASDAQ	ATRC	Mon, Jul 11, 2022	43.56	44.25	41.76	42.08
4256	NASDAQ	ATRC	Fri, Jul 8, 2022	43.39	44.46	42.50	43.78
4255	NASDAQ	ATRC	Thu, Jul 7, 2022	42.71	44.05	42.67	44.02
4254	NASDAQ	ATRC	Wed, Jul 6, 2022	42.50	43.28	41.98	42.61
4253	NASDAQ	ATRC	Tue, Jul 5, 2022	40.80	42.78	39.91	42.50
4252	NASDAQ	ATRC	Fri, Jul 1, 2022	40.60	41.77	40.07	41.01
4251	NASDAQ	ATRC	Thu, Jun 30, 2022	40.30	40.99	39.16	40.86
4250	NASDAQ	ATRC	Wed, Jun 29, 2022	39.80	40.97	38.54	40.78
4249	NASDAQ	ATRC	Tue, Jun 28, 2022	40.55	41.10	39.44	39.66
4248	NASDAQ	ATRC	Mon, Jun 27, 2022	41.28	41.34	40.39	40.71
4247	NASDAQ	ATRC	Fri, Jun 24, 2022	39.08	41.24	39.08	40.92
4246	NASDAQ	ATRC	Thu, Jun 23, 2022	38.76	40.12	38.74	39.44
4245	NASDAQ	ATRC	Wed, Jun 22, 2022	36.89	39.00	36.89	38.54
4244	NASDAQ	ATRC	Tue, Jun 21, 2022	36.98	37.87	36.69	37.28
4243	NASDAQ	ATRC	Fri, Jun 17, 2022	35.97	37.30	35.65	36.23
4242	NASDAQ	ATRC	Thu, Jun 16, 2022	35.00	35.30	32.84	35.10
4241	NASDAQ	ATRC	Wed, Jun 15, 2022	35.80	36.62	35.00	35.90
4240	NASDAQ	ATRC	Tue, Jun 14, 2022	36.88	36.88	35.00	35.16
4239	NASDAQ	ATRC	Mon, Jun 13, 2022	37.40	39.04	36.34	36.78
4238	NASDAQ	ATRC	Fri, Jun 10, 2022	38.30	39.46	38.21	38.86
4237	NASDAQ	ATRC	Thu, Jun 9, 2022	41.54	41.54	39.15	39.20
4236	NASDAQ	ATRC	Wed, Jun 8, 2022	41.98	43.03	41.89	42.09
4235	NASDAQ	ATRC	Tue, Jun 7, 2022	41.45	42.75	41.19	42.09
4234	NASDAQ	ATRC	Mon, Jun 6, 2022	42.61	42.81	41.33	41.76
4233	NASDAQ	ATRC	Fri, Jun 3, 2022	42.56	43.56	41.34	42.05
4232	NASDAQ	ATRC	Thu, Jun 2, 2022	39.89	43.08	39.53	43.02
4231	NASDAQ	ATRC	Wed, Jun 1, 2022	40.91	41.63	39.24	39.94
4230	NASDAQ	ATRC	Tue, May 31, 2022	42.47	42.59	40.36	40.63
4229	NASDAQ	ATRC	Fri, May 27, 2022	41.79	42.82	41.38	42.08
4228	NASDAQ	ATRC	Thu, May 26, 2022	42.29	42.73	41.05	41.33
4227	NASDAQ	ATRC	Wed, May 25, 2022	41.41	42.84	41.30	42.08
4226	NASDAQ	ATRC	Tue, May 24, 2022	43.03	43.71	41.11	41.34
4225	NASDAQ	ATRC	Mon, May 23, 2022	44.14	44.51	42.93	43.38
4224	NASDAQ	ATRC	Fri, May 20, 2022	43.12	43.82	41.83	43.67
4223	NASDAQ	ATRC	Thu, May 19, 2022	41.41	43.16	41.02	42.39
4222	NASDAQ	ATRC	Wed, May 18, 2022	42.08	42.75	41.33	41.77
4221	NASDAQ	ATRC	Tue, May 17, 2022	42.44	43.12	42.28	43.08
4220	NASDAQ	ATRC	Mon, May 16, 2022	42.63	43.41	41.27	41.44
4219	NASDAQ	ATRC	Fri, May 13, 2022	42.64	43.75	41.87	42.89
4218	NASDAQ	ATRC	Thu, May 12, 2022	38.64	42.62	38.64	41.68
4217	NASDAQ	ATRC	Wed, May 11, 2022	40.56	43.97	39.25	39.59
4216	NASDAQ	ATRC	Tue, May 10, 2022	41.59	42.50	39.27	40.49
4215	NASDAQ	ATRC	Mon, May 9, 2022	44.21	44.98	40.20	40.53
4214	NASDAQ	ATRC	Fri, May 6, 2022	49.65	49.65	44.73	44.98
4213	NASDAQ	ATRC	Thu, May 5, 2022	52.37	53.10	48.20	49.51
4212	NASDAQ	ATRC	Wed, May 4, 2022	54.63	54.94	48.92	53.33
4211	NASDAQ	ATRC	Tue, May 3, 2022	54.33	56.18	53.60	54.63
4210	NASDAQ	ATRC	Mon, May 2, 2022	52.04	55.40	52.04	54.75
4209	NASDAQ	ATRC	Fri, Apr 29, 2022	53.99	54.88	51.39	51.93
4208	NASDAQ	ATRC	Thu, Apr 28, 2022	56.02	58.83	52.51	54.00
4207	NASDAQ	ATRC	Wed, Apr 27, 2022	56.31	56.94	54.89	55.41
4206	NASDAQ	ATRC	Tue, Apr 26, 2022	58.53	58.76	56.27	56.38
4205	NASDAQ	ATRC	Mon, Apr 25, 2022	57.80	59.81	57.80	59.21
4204	NASDAQ	ATRC	Fri, Apr 22, 2022	59.29	59.48	58.12	58.28
4203	NASDAQ	ATRC	Thu, Apr 21, 2022	61.93	62.19	59.29	59.73
4202	NASDAQ	ATRC	Wed, Apr 20, 2022	60.39	62.31	59.90	60.86
4201	NASDAQ	ATRC	Tue, Apr 19, 2022	55.90	60.33	55.90	59.99
4200	NASDAQ	ATRC	Mon, Apr 18, 2022	56.86	57.41	54.57	55.90
4199	NASDAQ	ATRC	Thu, Apr 14, 2022	59.73	59.86	55.85	57.05
4198	NASDAQ	ATRC	Wed, Apr 13, 2022	59.23	59.99	57.83	58.76
4197	NASDAQ	ATRC	Tue, Apr 12, 2022	59.10	60.56	58.71	59.06
4196	NASDAQ	ATRC	Mon, Apr 11, 2022	60.48	61.54	58.52	59.10
4195	NASDAQ	ATRC	Fri, Apr 8, 2022	61.59	62.43	60.62	61.11
4194	NASDAQ	ATRC	Thu, Apr 7, 2022	61.92	62.93	61.35	62.02
4193	NASDAQ	ATRC	Wed, Apr 6, 2022	61.92	62.85	60.37	62.04
4192	NASDAQ	ATRC	Tue, Apr 5, 2022	64.69	65.10	63.00	63.46
4191	NASDAQ	ATRC	Mon, Apr 4, 2022	66.04	66.15	62.69	64.50
4190	NASDAQ	ATRC	Fri, Apr 1, 2022	65.59	68.58	65.22	66.01
4189	NASDAQ	ATRC	Thu, Mar 31, 2022	64.18	66.30	63.12	65.67
4188	NASDAQ	ATRC	Wed, Mar 30, 2022	64.19	65.33	63.93	64.24
4187	NASDAQ	ATRC	Tue, Mar 29, 2022	63.68	65.51	63.68	64.60
4186	NASDAQ	ATRC	Mon, Mar 28, 2022	62.40	63.07	61.24	62.55
4185	NASDAQ	ATRC	Fri, Mar 25, 2022	62.65	63.90	61.96	62.52
4184	NASDAQ	ATRC	Thu, Mar 24, 2022	62.92	63.37	60.80	63.23
4183	NASDAQ	ATRC	Wed, Mar 23, 2022	64.24	64.24	61.70	62.31
4182	NASDAQ	ATRC	Tue, Mar 22, 2022	64.39	65.82	64.06	64.99
4181	NASDAQ	ATRC	Mon, Mar 21, 2022	66.01	66.35	63.84	64.50
4180	NASDAQ	ATRC	Fri, Mar 18, 2022	65.69	66.52	64.97	66.36
4179	NASDAQ	ATRC	Thu, Mar 17, 2022	62.27	66.25	62.27	65.59
4178	NASDAQ	ATRC	Wed, Mar 16, 2022	60.10	62.89	59.09	62.77
4177	NASDAQ	ATRC	Tue, Mar 15, 2022	57.86	60.45	57.64	59.03
4176	NASDAQ	ATRC	Mon, Mar 14, 2022	58.60	60.98	56.84	57.43
4175	NASDAQ	ATRC	Fri, Mar 11, 2022	64.74	64.74	59.50	59.70
4174	NASDAQ	ATRC	Thu, Mar 10, 2022	63.40	64.40	61.93	64.09
4173	NASDAQ	ATRC	Wed, Mar 9, 2022	65.70	65.72	64.44	64.79
4172	NASDAQ	ATRC	Tue, Mar 8, 2022	63.46	64.84	61.07	63.90
4171	NASDAQ	ATRC	Mon, Mar 7, 2022	67.34	67.37	64.18	64.46
4170	NASDAQ	ATRC	Fri, Mar 4, 2022	68.66	69.42	66.70	67.45
4169	NASDAQ	ATRC	Thu, Mar 3, 2022	71.71	72.18	68.86	69.48
4168	NASDAQ	ATRC	Wed, Mar 2, 2022	69.95	71.66	65.81	71.15
4167	NASDAQ	ATRC	Tue, Mar 1, 2022	69.55	72.31	68.50	69.59
4166	NASDAQ	ATRC	Mon, Feb 28, 2022	67.97	69.95	67.28	69.45
4165	NASDAQ	ATRC	Fri, Feb 25, 2022	67.53	68.92	66.47	68.56
4164	NASDAQ	ATRC	Thu, Feb 24, 2022	60.27	67.34	60.27	67.15
4163	NASDAQ	ATRC	Wed, Feb 23, 2022	63.38	64.51	62.29	62.39
4162	NASDAQ	ATRC	Tue, Feb 22, 2022	61.02	64.40	61.02	62.78
4161	NASDAQ	ATRC	Fri, Feb 18, 2022	63.09	63.94	61.18	61.73
4160	NASDAQ	ATRC	Thu, Feb 17, 2022	67.00	67.75	63.79	63.91
4159	NASDAQ	ATRC	Wed, Feb 16, 2022	59.00	68.36	59.00	67.92
4158	NASDAQ	ATRC	Tue, Feb 15, 2022	65.12	66.44	64.86	65.50
4157	NASDAQ	ATRC	Mon, Feb 14, 2022	65.47	66.08	63.62	64.20
4156	NASDAQ	ATRC	Fri, Feb 11, 2022	67.92	69.08	64.46	65.15
4155	NASDAQ	ATRC	Thu, Feb 10, 2022	66.55	69.92	66.55	67.60
4154	NASDAQ	ATRC	Wed, Feb 9, 2022	67.17	69.35	66.90	68.50
4153	NASDAQ	ATRC	Tue, Feb 8, 2022	64.08	66.43	63.35	66.08
4152	NASDAQ	ATRC	Mon, Feb 7, 2022	64.43	65.75	63.42	64.62
4151	NASDAQ	ATRC	Fri, Feb 4, 2022	63.09	65.14	62.54	64.46
4150	NASDAQ	ATRC	Thu, Feb 3, 2022	64.17	65.79	62.75	63.26
4149	NASDAQ	ATRC	Wed, Feb 2, 2022	66.29	66.52	63.93	65.20
4148	NASDAQ	ATRC	Tue, Feb 1, 2022	65.65	66.44	63.99	66.03
4147	NASDAQ	ATRC	Mon, Jan 31, 2022	61.61	65.67	60.54	65.64
4146	NASDAQ	ATRC	Fri, Jan 28, 2022	59.25	61.06	57.56	61.06
4145	NASDAQ	ATRC	Thu, Jan 27, 2022	61.65	63.82	59.34	59.39
4144	NASDAQ	ATRC	Wed, Jan 26, 2022	62.29	62.83	59.77	61.19
4143	NASDAQ	ATRC	Tue, Jan 25, 2022	63.32	63.32	59.87	60.76
4142	NASDAQ	ATRC	Mon, Jan 24, 2022	59.97	63.71	59.27	63.45
4141	NASDAQ	ATRC	Fri, Jan 21, 2022	61.34	63.75	60.16	61.45
4140	NASDAQ	ATRC	Thu, Jan 20, 2022	64.32	65.19	61.83	61.99
4139	NASDAQ	ATRC	Wed, Jan 19, 2022	64.43	66.90	63.40	63.63
4138	NASDAQ	ATRC	Tue, Jan 18, 2022	64.20	66.05	63.12	64.23
4137	NASDAQ	ATRC	Fri, Jan 14, 2022	66.10	66.71	63.17	65.44
4136	NASDAQ	ATRC	Thu, Jan 13, 2022	68.89	68.89	66.15	66.93
4135	NASDAQ	ATRC	Wed, Jan 12, 2022	70.66	71.57	68.29	68.40
4134	NASDAQ	ATRC	Tue, Jan 11, 2022	66.39	70.94	65.79	70.57
4133	NASDAQ	ATRC	Mon, Jan 10, 2022	61.64	66.53	60.35	66.39
4132	NASDAQ	ATRC	Fri, Jan 7, 2022	64.31	65.84	61.45	61.62
4131	NASDAQ	ATRC	Thu, Jan 6, 2022	64.97	66.27	63.20	64.94
4130	NASDAQ	ATRC	Wed, Jan 5, 2022	68.89	70.25	64.84	64.93
4129	NASDAQ	ATRC	Tue, Jan 4, 2022	71.40	71.41	68.42	69.28
4128	NASDAQ	ATRC	Mon, Jan 3, 2022	70.00	71.58	67.37	71.39
4127	NASDAQ	ATRC	Fri, Dec 31, 2021	68.31	70.00	66.46	69.53
4126	NASDAQ	ATRC	Thu, Dec 30, 2021	69.99	70.00	68.37	68.52
4125	NASDAQ	ATRC	Wed, Dec 29, 2021	71.94	72.76	69.28	69.81
4124	NASDAQ	ATRC	Tue, Dec 28, 2021	73.00	73.60	70.92	71.56
4123	NASDAQ	ATRC	Mon, Dec 27, 2021	73.40	74.85	71.02	73.01
4122	NASDAQ	ATRC	Thu, Dec 23, 2021	71.55	73.78	70.77	73.36
4121	NASDAQ	ATRC	Wed, Dec 22, 2021	69.31	71.63	68.22	71.45
4120	NASDAQ	ATRC	Tue, Dec 21, 2021	67.08	69.94	65.99	69.21
4119	NASDAQ	ATRC	Mon, Dec 20, 2021	66.70	66.99	64.46	65.68
4118	NASDAQ	ATRC	Fri, Dec 17, 2021	66.62	68.87	65.13	67.82
4117	NASDAQ	ATRC	Thu, Dec 16, 2021	70.27	70.94	66.16	66.56
4116	NASDAQ	ATRC	Wed, Dec 15, 2021	67.28	69.83	66.06	69.57
4115	NASDAQ	ATRC	Tue, Dec 14, 2021	68.64	70.07	66.59	67.28
4114	NASDAQ	ATRC	Mon, Dec 13, 2021	68.26	71.39	65.54	69.35
4113	NASDAQ	ATRC	Fri, Dec 10, 2021	70.88	72.58	68.63	68.68
4112	NASDAQ	ATRC	Thu, Dec 9, 2021	72.77	74.84	69.75	70.31
4111	NASDAQ	ATRC	Wed, Dec 8, 2021	71.16	74.19	70.44	73.35
4110	NASDAQ	ATRC	Tue, Dec 7, 2021	68.84	71.88	68.14	71.08
4109	NASDAQ	ATRC	Mon, Dec 6, 2021	65.89	68.38	64.03	67.59
4108	NASDAQ	ATRC	Fri, Dec 3, 2021	68.08	68.87	63.88	65.20
4107	NASDAQ	ATRC	Thu, Dec 2, 2021	65.67	68.32	65.06	67.94
4106	NASDAQ	ATRC	Wed, Dec 1, 2021	65.52	72.16	64.03	65.53
4105	NASDAQ	ATRC	Tue, Nov 30, 2021	66.60	67.44	63.31	63.40
4104	NASDAQ	ATRC	Mon, Nov 29, 2021	72.33	73.51	65.94	66.00
4103	NASDAQ	ATRC	Fri, Nov 26, 2021	75.19	77.00	70.49	71.01
4102	NASDAQ	ATRC	Wed, Nov 24, 2021	74.89	76.88	73.39	76.72
4101	NASDAQ	ATRC	Tue, Nov 23, 2021	75.26	76.40	73.27	75.39
4100	NASDAQ	ATRC	Mon, Nov 22, 2021	77.67	79.63	75.66	75.95
4099	NASDAQ	ATRC	Fri, Nov 19, 2021	77.54	78.11	76.75	77.64
4098	NASDAQ	ATRC	Thu, Nov 18, 2021	78.00	78.21	76.16	76.77
4097	NASDAQ	ATRC	Wed, Nov 17, 2021	76.31	78.57	75.15	78.31
4096	NASDAQ	ATRC	Tue, Nov 16, 2021	74.65	77.26	73.56	76.58
4095	NASDAQ	ATRC	Mon, Nov 15, 2021	77.83	77.83	73.99	75.00
4094	NASDAQ	ATRC	Fri, Nov 12, 2021	79.28	79.28	77.13	77.21
4093	NASDAQ	ATRC	Thu, Nov 11, 2021	78.75	79.42	77.71	78.33
4092	NASDAQ	ATRC	Wed, Nov 10, 2021	81.03	82.31	78.33	78.48
4091	NASDAQ	ATRC	Tue, Nov 9, 2021	84.95	84.95	81.30	81.50
4090	NASDAQ	ATRC	Mon, Nov 8, 2021	87.21	87.52	84.61	84.80
4089	NASDAQ	ATRC	Fri, Nov 5, 2021	85.57	89.18	85.03	87.14
4088	NASDAQ	ATRC	Thu, Nov 4, 2021	79.17	85.78	79.17	85.40
4087	NASDAQ	ATRC	Wed, Nov 3, 2021	77.30	78.84	76.23	78.42
4086	NASDAQ	ATRC	Tue, Nov 2, 2021	77.52	78.11	76.00	77.64
4085	NASDAQ	ATRC	Mon, Nov 1, 2021	75.42	78.28	75.03	77.50
4084	NASDAQ	ATRC	Fri, Oct 29, 2021	75.37	75.58	73.57	75.06
4083	NASDAQ	ATRC	Thu, Oct 28, 2021	75.61	76.62	74.64	75.38
4082	NASDAQ	ATRC	Wed, Oct 27, 2021	75.28	76.53	74.43	75.54
4081	NASDAQ	ATRC	Tue, Oct 26, 2021	73.84	75.31	72.87	75.21
4080	NASDAQ	ATRC	Mon, Oct 25, 2021	73.11	74.36	72.50	73.60
4079	NASDAQ	ATRC	Fri, Oct 22, 2021	72.29	73.71	70.87	73.13
4078	NASDAQ	ATRC	Thu, Oct 21, 2021	72.66	73.03	71.71	72.31
4077	NASDAQ	ATRC	Wed, Oct 20, 2021	72.39	72.89	71.90	72.39
4076	NASDAQ	ATRC	Tue, Oct 19, 2021	72.16	72.91	70.91	71.97
4075	NASDAQ	ATRC	Mon, Oct 18, 2021	71.61	71.75	70.50	71.22
4074	NASDAQ	ATRC	Fri, Oct 15, 2021	72.38	72.38	71.10	71.37
4073	NASDAQ	ATRC	Thu, Oct 14, 2021	72.02	72.52	70.80	71.38
4072	NASDAQ	ATRC	Wed, Oct 13, 2021	71.67	71.67	70.13	70.96
4071	NASDAQ	ATRC	Tue, Oct 12, 2021	70.77	72.20	70.35	71.11
4070	NASDAQ	ATRC	Mon, Oct 11, 2021	70.81	71.73	70.13	70.32
4069	NASDAQ	ATRC	Fri, Oct 8, 2021	71.80	72.12	70.88	70.88
4068	NASDAQ	ATRC	Thu, Oct 7, 2021	70.61	72.94	70.34	71.94
4067	NASDAQ	ATRC	Wed, Oct 6, 2021	68.93	70.37	68.09	70.29
4066	NASDAQ	ATRC	Tue, Oct 5, 2021	67.64	69.42	67.36	69.34
4065	NASDAQ	ATRC	Mon, Oct 4, 2021	69.39	69.39	66.44	67.21
4064	NASDAQ	ATRC	Fri, Oct 1, 2021	70.00	70.23	67.92	69.77
4063	NASDAQ	ATRC	Thu, Sep 30, 2021	69.88	71.11	69.24	69.55
4062	NASDAQ	ATRC	Wed, Sep 29, 2021	70.56	71.21	69.01	69.28
4061	NASDAQ	ATRC	Tue, Sep 28, 2021	72.11	72.11	70.26	70.45
4060	NASDAQ	ATRC	Mon, Sep 27, 2021	71.58	73.23	70.34	72.59
4059	NASDAQ	ATRC	Fri, Sep 24, 2021	74.00	74.00	71.55	71.75
4058	NASDAQ	ATRC	Thu, Sep 23, 2021	74.87	75.30	74.09	74.35
4057	NASDAQ	ATRC	Wed, Sep 22, 2021	73.78	75.56	72.97	74.67
4056	NASDAQ	ATRC	Tue, Sep 21, 2021	73.08	73.77	72.18	73.35
4055	NASDAQ	ATRC	Mon, Sep 20, 2021	75.32	75.60	72.27	72.59
4054	NASDAQ	ATRC	Fri, Sep 17, 2021	76.67	77.37	75.40	76.71
4053	NASDAQ	ATRC	Thu, Sep 16, 2021	74.70	75.97	73.51	75.80
4052	NASDAQ	ATRC	Wed, Sep 15, 2021	75.22	75.53	73.17	74.87
4051	NASDAQ	ATRC	Tue, Sep 14, 2021	76.20	77.46	74.72	75.40
4050	NASDAQ	ATRC	Mon, Sep 13, 2021	74.98	76.12	73.63	75.62
4049	NASDAQ	ATRC	Fri, Sep 10, 2021	77.18	77.18	74.41	74.68
4048	NASDAQ	ATRC	Thu, Sep 9, 2021	77.24	77.66	76.06	76.50
4047	NASDAQ	ATRC	Wed, Sep 8, 2021	75.19	77.27	74.39	77.12
4046	NASDAQ	ATRC	Tue, Sep 7, 2021	76.32	76.32	74.87	75.39
4045	NASDAQ	ATRC	Fri, Sep 3, 2021	75.58	76.66	75.38	76.36
4044	NASDAQ	ATRC	Thu, Sep 2, 2021	75.16	76.32	74.39	75.81
4043	NASDAQ	ATRC	Wed, Sep 1, 2021	74.02	75.03	73.01	74.90
4042	NASDAQ	ATRC	Tue, Aug 31, 2021	74.03	74.43	72.52	73.62
4041	NASDAQ	ATRC	Mon, Aug 30, 2021	74.59	75.12	73.24	73.83
4040	NASDAQ	ATRC	Fri, Aug 27, 2021	72.98	75.19	72.01	74.48
4039	NASDAQ	ATRC	Thu, Aug 26, 2021	74.00	74.50	72.43	72.55
4038	NASDAQ	ATRC	Wed, Aug 25, 2021	75.79	76.18	73.62	74.09
4037	NASDAQ	ATRC	Tue, Aug 24, 2021	75.66	76.43	74.28	75.92
4036	NASDAQ	ATRC	Mon, Aug 23, 2021	75.00	76.58	73.99	75.29
4035	NASDAQ	ATRC	Fri, Aug 20, 2021	72.78	75.07	72.34	74.76
4034	NASDAQ	ATRC	Thu, Aug 19, 2021	72.71	74.23	71.92	72.61
4033	NASDAQ	ATRC	Wed, Aug 18, 2021	73.48	74.35	72.50	72.97
4032	NASDAQ	ATRC	Tue, Aug 17, 2021	72.09	74.51	71.51	73.61
4031	NASDAQ	ATRC	Mon, Aug 16, 2021	73.00	73.77	71.78	72.82
4030	NASDAQ	ATRC	Fri, Aug 13, 2021	73.31	73.98	72.78	73.24
4029	NASDAQ	ATRC	Thu, Aug 12, 2021	71.89	74.23	71.57	73.56
4028	NASDAQ	ATRC	Wed, Aug 11, 2021	73.06	73.77	69.91	72.10
4027	NASDAQ	ATRC	Tue, Aug 10, 2021	78.79	79.57	72.64	73.10
4026	NASDAQ	ATRC	Mon, Aug 9, 2021	83.88	83.92	78.91	79.00
4025	NASDAQ	ATRC	Fri, Aug 6, 2021	81.50	83.79	78.52	83.75
4024	NASDAQ	ATRC	Thu, Aug 5, 2021	81.41	85.50	78.53	81.47
4023	NASDAQ	ATRC	Wed, Aug 4, 2021	83.66	84.16	81.26	81.88
4022	NASDAQ	ATRC	Tue, Aug 3, 2021	84.18	84.47	82.96	83.52
4021	NASDAQ	ATRC	Mon, Aug 2, 2021	84.62	85.37	83.57	84.25
4020	NASDAQ	ATRC	Fri, Jul 30, 2021	83.64	85.27	83.64	84.46
4019	NASDAQ	ATRC	Thu, Jul 29, 2021	82.27	84.36	82.27	83.64
4018	NASDAQ	ATRC	Wed, Jul 28, 2021	80.21	83.14	80.21	82.22
4017	NASDAQ	ATRC	Tue, Jul 27, 2021	80.82	81.27	79.41	79.99
4016	NASDAQ	ATRC	Mon, Jul 26, 2021	80.50	81.44	79.50	80.68
4015	NASDAQ	ATRC	Fri, Jul 23, 2021	80.57	80.57	78.27	80.17
4014	NASDAQ	ATRC	Thu, Jul 22, 2021	79.97	80.27	79.00	80.25
4013	NASDAQ	ATRC	Wed, Jul 21, 2021	80.07	80.93	78.97	79.98
4012	NASDAQ	ATRC	Tue, Jul 20, 2021	77.78	80.35	77.56	79.41
4011	NASDAQ	ATRC	Mon, Jul 19, 2021	76.30	78.26	76.02	77.22
4010	NASDAQ	ATRC	Fri, Jul 16, 2021	78.03	78.49	77.07	77.58
4009	NASDAQ	ATRC	Thu, Jul 15, 2021	78.44	79.05	77.06	77.39
4008	NASDAQ	ATRC	Wed, Jul 14, 2021	82.13	82.95	78.07	79.06
4007	NASDAQ	ATRC	Tue, Jul 13, 2021	83.85	83.85	80.97	81.80
4006	NASDAQ	ATRC	Mon, Jul 12, 2021	82.25	84.43	81.36	83.92
4005	NASDAQ	ATRC	Fri, Jul 9, 2021	81.77	83.05	81.29	82.24
4004	NASDAQ	ATRC	Thu, Jul 8, 2021	79.97	81.94	78.57	81.50
4003	NASDAQ	ATRC	Wed, Jul 7, 2021	79.88	81.57	79.02	81.42
4002	NASDAQ	ATRC	Tue, Jul 6, 2021	81.00	81.32	78.32	79.82
4001	NASDAQ	ATRC	Fri, Jul 2, 2021	81.43	81.55	79.83	81.10
4000	NASDAQ	ATRC	Thu, Jul 1, 2021	79.53	81.21	79.09	81.03
3999	NASDAQ	ATRC	Wed, Jun 30, 2021	79.17	80.00	78.75	79.33
3998	NASDAQ	ATRC	Tue, Jun 29, 2021	79.68	79.68	78.88	79.30
3997	NASDAQ	ATRC	Mon, Jun 28, 2021	80.55	80.98	79.38	79.83
3996	NASDAQ	ATRC	Fri, Jun 25, 2021	78.85	80.67	78.57	80.18
3995	NASDAQ	ATRC	Thu, Jun 24, 2021	78.14	78.75	77.67	78.57
3994	NASDAQ	ATRC	Wed, Jun 23, 2021	75.92	77.75	75.48	77.45
3993	NASDAQ	ATRC	Tue, Jun 22, 2021	76.15	76.82	75.20	76.12
3992	NASDAQ	ATRC	Mon, Jun 21, 2021	74.50	77.13	73.88	76.53
3991	NASDAQ	ATRC	Fri, Jun 18, 2021	76.40	77.03	74.21	74.54
3990	NASDAQ	ATRC	Thu, Jun 17, 2021	75.29	77.86	75.28	77.38
3989	NASDAQ	ATRC	Wed, Jun 16, 2021	77.48	77.48	75.33	75.88
3988	NASDAQ	ATRC	Tue, Jun 15, 2021	77.61	79.20	77.02	77.93
3987	NASDAQ	ATRC	Mon, Jun 14, 2021	76.19	76.99	75.56	76.86
3986	NASDAQ	ATRC	Fri, Jun 11, 2021	75.10	76.11	72.69	75.92
3985	NASDAQ	ATRC	Thu, Jun 10, 2021	74.30	75.54	73.20	75.30
3984	NASDAQ	ATRC	Wed, Jun 9, 2021	73.95	76.31	73.81	73.96
3983	NASDAQ	ATRC	Tue, Jun 8, 2021	75.02	75.64	73.24	73.77
3982	NASDAQ	ATRC	Mon, Jun 7, 2021	74.85	75.89	74.15	74.77
3981	NASDAQ	ATRC	Fri, Jun 4, 2021	74.47	75.45	73.86	74.58
3980	NASDAQ	ATRC	Thu, Jun 3, 2021	73.38	74.64	71.07	74.05
3979	NASDAQ	ATRC	Wed, Jun 2, 2021	75.66	75.66	73.07	73.39
3978	NASDAQ	ATRC	Tue, Jun 1, 2021	74.82	76.51	74.00	75.40
3977	NASDAQ	ATRC	Fri, May 28, 2021	74.28	75.80	73.72	74.73
3976	NASDAQ	ATRC	Thu, May 27, 2021	73.00	74.13	72.35	73.62
3975	NASDAQ	ATRC	Wed, May 26, 2021	72.18	74.01	70.26	72.95
3974	NASDAQ	ATRC	Tue, May 25, 2021	72.99	72.99	71.42	71.58
3973	NASDAQ	ATRC	Mon, May 24, 2021	72.50	72.78	71.08	72.43
3972	NASDAQ	ATRC	Fri, May 21, 2021	72.17	72.91	71.56	72.05
3971	NASDAQ	ATRC	Thu, May 20, 2021	71.49	71.77	70.10	71.44
3970	NASDAQ	ATRC	Wed, May 19, 2021	71.72	72.26	70.21	71.13
3969	NASDAQ	ATRC	Tue, May 18, 2021	73.29	75.16	72.69	72.71
3968	NASDAQ	ATRC	Mon, May 17, 2021	71.84	74.81	70.81	72.60
3967	NASDAQ	ATRC	Fri, May 14, 2021	71.42	72.06	70.70	72.00
3966	NASDAQ	ATRC	Thu, May 13, 2021	70.86	72.45	70.44	70.46
3965	NASDAQ	ATRC	Wed, May 12, 2021	73.07	73.14	70.38	70.58
3964	NASDAQ	ATRC	Tue, May 11, 2021	71.87	74.51	70.98	73.91
3963	NASDAQ	ATRC	Mon, May 10, 2021	76.69	77.53	73.25	73.46
3962	NASDAQ	ATRC	Fri, May 7, 2021	77.01	80.44	77.01	77.67
3961	NASDAQ	ATRC	Thu, May 6, 2021	77.10	77.73	75.00	77.71
3960	NASDAQ	ATRC	Wed, May 5, 2021	76.90	77.99	75.28	77.03
3959	NASDAQ	ATRC	Tue, May 4, 2021	77.17	79.16	75.94	77.33
3958	NASDAQ	ATRC	Mon, May 3, 2021	77.02	78.99	76.51	77.43
3957	NASDAQ	ATRC	Fri, Apr 30, 2021	76.23	77.51	74.89	77.07
3956	NASDAQ	ATRC	Thu, Apr 29, 2021	71.90	79.54	71.64	76.00
3955	NASDAQ	ATRC	Wed, Apr 28, 2021	65.54	70.64	63.34	69.85
3954	NASDAQ	ATRC	Tue, Apr 27, 2021	66.90	66.90	64.38	64.91
3953	NASDAQ	ATRC	Mon, Apr 26, 2021	68.70	68.70	65.52	66.00
3952	NASDAQ	ATRC	Fri, Apr 23, 2021	70.55	72.07	68.94	69.00
3951	NASDAQ	ATRC	Thu, Apr 22, 2021	69.79	71.38	69.73	70.02
3950	NASDAQ	ATRC	Wed, Apr 21, 2021	67.79	70.05	66.93	69.91
3949	NASDAQ	ATRC	Tue, Apr 20, 2021	69.79	70.83	67.79	68.00
3948	NASDAQ	ATRC	Mon, Apr 19, 2021	67.51	69.68	67.51	69.61
3947	NASDAQ	ATRC	Fri, Apr 16, 2021	67.40	68.30	65.97	68.00
3946	NASDAQ	ATRC	Thu, Apr 15, 2021	66.88	67.66	66.37	67.59
3945	NASDAQ	ATRC	Wed, Apr 14, 2021	66.24	67.48	65.38	66.30
3944	NASDAQ	ATRC	Tue, Apr 13, 2021	66.07	66.75	64.73	65.96
3943	NASDAQ	ATRC	Mon, Apr 12, 2021	66.24	67.28	65.37	65.83
3942	NASDAQ	ATRC	Fri, Apr 9, 2021	66.63	66.84	64.60	65.90
3941	NASDAQ	ATRC	Thu, Apr 8, 2021	65.63	66.73	64.91	66.53
3940	NASDAQ	ATRC	Wed, Apr 7, 2021	65.92	66.52	64.49	64.91
3939	NASDAQ	ATRC	Tue, Apr 6, 2021	64.96	65.84	64.76	65.68
3938	NASDAQ	ATRC	Mon, Apr 5, 2021	64.22	65.01	62.67	64.89
3937	NASDAQ	ATRC	Thu, Apr 1, 2021	65.58	66.26	63.35	64.13
3936	NASDAQ	ATRC	Wed, Mar 31, 2021	63.79	66.71	63.01	65.52
3935	NASDAQ	ATRC	Tue, Mar 30, 2021	62.26	64.29	61.17	63.26
3934	NASDAQ	ATRC	Mon, Mar 29, 2021	63.42	63.42	58.47	62.26
3933	NASDAQ	ATRC	Fri, Mar 26, 2021	62.68	63.50	62.06	63.40
3932	NASDAQ	ATRC	Thu, Mar 25, 2021	60.45	62.86	59.73	62.39
3931	NASDAQ	ATRC	Wed, Mar 24, 2021	63.33	63.58	60.96	61.25
3930	NASDAQ	ATRC	Tue, Mar 23, 2021	62.14	63.27	62.01	63.07
3929	NASDAQ	ATRC	Mon, Mar 22, 2021	62.56	64.07	62.20	62.74
3928	NASDAQ	ATRC	Fri, Mar 19, 2021	61.66	63.20	60.44	62.46
3927	NASDAQ	ATRC	Thu, Mar 18, 2021	65.21	65.56	61.08	61.94
3926	NASDAQ	ATRC	Wed, Mar 17, 2021	66.29	66.58	64.39	65.96
3925	NASDAQ	ATRC	Tue, Mar 16, 2021	66.64	67.04	64.98	66.10
3924	NASDAQ	ATRC	Mon, Mar 15, 2021	65.25	67.46	65.25	66.81
3923	NASDAQ	ATRC	Fri, Mar 12, 2021	65.05	66.32	63.97	65.81
3922	NASDAQ	ATRC	Thu, Mar 11, 2021	63.75	66.32	63.75	65.10
3921	NASDAQ	ATRC	Wed, Mar 10, 2021	63.80	63.80	62.15	63.16
3920	NASDAQ	ATRC	Tue, Mar 9, 2021	63.65	64.69	62.77	62.81
3919	NASDAQ	ATRC	Mon, Mar 8, 2021	64.31	64.67	62.24	62.55
3918	NASDAQ	ATRC	Fri, Mar 5, 2021	63.01	63.84	59.76	63.73
3917	NASDAQ	ATRC	Thu, Mar 4, 2021	66.64	68.00	61.03	62.65
3916	NASDAQ	ATRC	Wed, Mar 3, 2021	65.97	67.21	65.23	66.98
3915	NASDAQ	ATRC	Tue, Mar 2, 2021	66.13	67.30	65.02	66.73
3914	NASDAQ	ATRC	Mon, Mar 1, 2021	66.67	67.61	65.24	66.31
3913	NASDAQ	ATRC	Fri, Feb 26, 2021	65.03	66.21	63.93	65.27
3912	NASDAQ	ATRC	Thu, Feb 25, 2021	62.41	65.35	62.41	64.78
3911	NASDAQ	ATRC	Wed, Feb 24, 2021	60.33	63.00	58.41	62.41
3910	NASDAQ	ATRC	Tue, Feb 23, 2021	64.37	64.37	61.35	62.24
3909	NASDAQ	ATRC	Mon, Feb 22, 2021	64.98	65.79	63.65	65.21
3908	NASDAQ	ATRC	Fri, Feb 19, 2021	64.93	66.63	63.71	65.48
3907	NASDAQ	ATRC	Thu, Feb 18, 2021	65.94	66.16	63.87	64.92
3906	NASDAQ	ATRC	Wed, Feb 17, 2021	64.78	66.08	63.69	66.03
3905	NASDAQ	ATRC	Tue, Feb 16, 2021	66.77	66.78	64.14	65.16
3904	NASDAQ	ATRC	Fri, Feb 12, 2021	64.43	67.01	63.38	66.60
3903	NASDAQ	ATRC	Thu, Feb 11, 2021	63.39	64.71	63.21	64.31
3902	NASDAQ	ATRC	Wed, Feb 10, 2021	62.32	63.55	61.74	62.90
3901	NASDAQ	ATRC	Tue, Feb 9, 2021	60.83	62.41	60.77	62.15
3900	NASDAQ	ATRC	Mon, Feb 8, 2021	60.42	61.58	60.02	60.54
3899	NASDAQ	ATRC	Fri, Feb 5, 2021	59.00	60.62	58.03	59.74
3898	NASDAQ	ATRC	Thu, Feb 4, 2021	58.43	59.54	57.11	58.42
3897	NASDAQ	ATRC	Wed, Feb 3, 2021	60.59	60.72	58.08	58.42
3896	NASDAQ	ATRC	Tue, Feb 2, 2021	59.61	60.96	59.47	60.73
3895	NASDAQ	ATRC	Mon, Feb 1, 2021	58.06	59.20	58.03	58.97
3894	NASDAQ	ATRC	Fri, Jan 29, 2021	57.87	58.62	56.69	58.23
3893	NASDAQ	ATRC	Thu, Jan 28, 2021	57.72	58.93	56.21	57.50
3892	NASDAQ	ATRC	Wed, Jan 27, 2021	57.50	59.89	56.57	57.50
3891	NASDAQ	ATRC	Tue, Jan 26, 2021	58.55	58.95	57.85	58.50
3890	NASDAQ	ATRC	Mon, Jan 25, 2021	58.73	59.26	57.52	58.30
3889	NASDAQ	ATRC	Fri, Jan 22, 2021	57.15	59.29	57.07	59.07
3888	NASDAQ	ATRC	Thu, Jan 21, 2021	57.87	57.88	56.82	57.15
3887	NASDAQ	ATRC	Wed, Jan 20, 2021	56.85	57.70	55.98	57.20
3886	NASDAQ	ATRC	Tue, Jan 19, 2021	55.77	57.42	55.77	56.36
3885	NASDAQ	ATRC	Fri, Jan 15, 2021	57.37	57.37	52.81	56.60
3884	NASDAQ	ATRC	Thu, Jan 14, 2021	58.42	59.09	56.89	58.14
3883	NASDAQ	ATRC	Wed, Jan 13, 2021	58.96	59.10	58.02	58.69
3882	NASDAQ	ATRC	Tue, Jan 12, 2021	59.15	59.80	58.41	58.66
3881	NASDAQ	ATRC	Mon, Jan 11, 2021	55.91	59.73	55.36	59.52
3880	NASDAQ	ATRC	Fri, Jan 8, 2021	56.07	57.42	56.07	56.92
3879	NASDAQ	ATRC	Thu, Jan 7, 2021	56.31	56.96	55.89	56.11
3878	NASDAQ	ATRC	Wed, Jan 6, 2021	55.55	57.03	54.99	56.16
3877	NASDAQ	ATRC	Tue, Jan 5, 2021	53.89	55.39	53.55	54.97
3876	NASDAQ	ATRC	Mon, Jan 4, 2021	55.65	56.08	52.54	53.79
3875	NASDAQ	ATRC	Thu, Dec 31, 2020	54.85	56.21	54.20	55.67
3874	NASDAQ	ATRC	Wed, Dec 30, 2020	55.52	57.15	54.31	54.84
3873	NASDAQ	ATRC	Tue, Dec 29, 2020	57.13	57.98	55.06	55.35
3872	NASDAQ	ATRC	Mon, Dec 28, 2020	58.00	58.03	56.80	57.08
3871	NASDAQ	ATRC	Thu, Dec 24, 2020	57.44	57.88	56.66	57.55
3870	NASDAQ	ATRC	Wed, Dec 23, 2020	56.13	58.00	55.77	57.37
3869	NASDAQ	ATRC	Tue, Dec 22, 2020	55.57	57.57	54.75	55.30
3868	NASDAQ	ATRC	Mon, Dec 21, 2020	54.28	55.91	53.80	55.16
3867	NASDAQ	ATRC	Fri, Dec 18, 2020	52.45	55.00	52.00	54.89
3866	NASDAQ	ATRC	Thu, Dec 17, 2020	48.78	52.90	47.92	52.24
3865	NASDAQ	ATRC	Wed, Dec 16, 2020	47.83	49.23	47.19	48.94
3864	NASDAQ	ATRC	Tue, Dec 15, 2020	48.51	48.59	47.63	47.83
3863	NASDAQ	ATRC	Mon, Dec 14, 2020	47.75	49.39	47.53	48.13
3862	NASDAQ	ATRC	Fri, Dec 11, 2020	47.74	48.47	46.01	46.87
3861	NASDAQ	ATRC	Thu, Dec 10, 2020	47.07	48.31	46.94	48.01
3860	NASDAQ	ATRC	Wed, Dec 9, 2020	48.37	48.37	46.46	47.35
3859	NASDAQ	ATRC	Tue, Dec 8, 2020	45.11	47.29	44.85	47.19
3858	NASDAQ	ATRC	Mon, Dec 7, 2020	45.99	46.25	43.67	45.35
3857	NASDAQ	ATRC	Fri, Dec 4, 2020	44.20	46.21	43.82	46.09
3856	NASDAQ	ATRC	Thu, Dec 3, 2020	43.69	44.18	43.07	44.02
3855	NASDAQ	ATRC	Wed, Dec 2, 2020	43.08	43.72	42.50	43.58
3854	NASDAQ	ATRC	Tue, Dec 1, 2020	43.76	43.89	42.98	43.23
3853	NASDAQ	ATRC	Mon, Nov 30, 2020	45.01	45.01	43.41	43.48
3852	NASDAQ	ATRC	Fri, Nov 27, 2020	43.77	44.14	43.44	43.84
3851	NASDAQ	ATRC	Wed, Nov 25, 2020	43.00	43.83	42.26	43.63
3850	NASDAQ	ATRC	Tue, Nov 24, 2020	43.68	43.71	42.32	43.27
3849	NASDAQ	ATRC	Mon, Nov 23, 2020	42.94	43.84	42.15	43.24
3848	NASDAQ	ATRC	Fri, Nov 20, 2020	42.59	43.09	41.68	42.46
3847	NASDAQ	ATRC	Thu, Nov 19, 2020	42.37	43.79	41.67	42.84
3846	NASDAQ	ATRC	Wed, Nov 18, 2020	40.55	41.35	40.11	40.80
3845	NASDAQ	ATRC	Tue, Nov 17, 2020	40.37	40.74	39.93	40.34
3844	NASDAQ	ATRC	Mon, Nov 16, 2020	40.18	40.70	39.61	40.70
3843	NASDAQ	ATRC	Fri, Nov 13, 2020	39.22	39.88	38.97	39.45
3842	NASDAQ	ATRC	Thu, Nov 12, 2020	39.14	39.68	38.33	38.99
3841	NASDAQ	ATRC	Wed, Nov 11, 2020	39.42	39.89	38.09	38.84
3840	NASDAQ	ATRC	Tue, Nov 10, 2020	38.60	39.59	38.00	39.15
3839	NASDAQ	ATRC	Mon, Nov 9, 2020	38.46	40.98	37.26	38.60
3838	NASDAQ	ATRC	Fri, Nov 6, 2020	39.85	39.85	36.47	36.71
3837	NASDAQ	ATRC	Thu, Nov 5, 2020	37.03	37.74	36.69	37.12
3836	NASDAQ	ATRC	Wed, Nov 4, 2020	36.83	37.75	35.58	36.65
3835	NASDAQ	ATRC	Tue, Nov 3, 2020	35.65	37.36	34.89	37.00
3834	NASDAQ	ATRC	Mon, Nov 2, 2020	34.84	36.63	34.42	34.97
3833	NASDAQ	ATRC	Fri, Oct 30, 2020	35.50	36.15	34.04	34.56
3832	NASDAQ	ATRC	Thu, Oct 29, 2020	36.61	37.22	34.68	35.50
3831	NASDAQ	ATRC	Wed, Oct 28, 2020	37.16	37.71	36.42	36.51
3830	NASDAQ	ATRC	Tue, Oct 27, 2020	37.06	37.99	36.91	37.69
3829	NASDAQ	ATRC	Mon, Oct 26, 2020	37.40	37.67	36.64	37.25
3828	NASDAQ	ATRC	Fri, Oct 23, 2020	38.65	39.45	37.50	37.96
3827	NASDAQ	ATRC	Thu, Oct 22, 2020	38.00	38.96	37.94	38.28
3826	NASDAQ	ATRC	Wed, Oct 21, 2020	38.72	38.80	37.63	37.97
3825	NASDAQ	ATRC	Tue, Oct 20, 2020	39.60	39.92	38.50	38.80
3824	NASDAQ	ATRC	Mon, Oct 19, 2020	41.04	41.98	39.48	39.58
3823	NASDAQ	ATRC	Fri, Oct 16, 2020	39.89	40.97	39.52	40.69
3822	NASDAQ	ATRC	Thu, Oct 15, 2020	39.91	40.24	39.31	39.94
3821	NASDAQ	ATRC	Wed, Oct 14, 2020	40.83	41.10	40.08	40.40
3820	NASDAQ	ATRC	Tue, Oct 13, 2020	40.68	41.36	40.38	40.79
3819	NASDAQ	ATRC	Mon, Oct 12, 2020	41.61	41.80	40.71	40.96
3818	NASDAQ	ATRC	Fri, Oct 9, 2020	40.00	41.36	39.63	41.35
3817	NASDAQ	ATRC	Thu, Oct 8, 2020	40.52	40.88	39.76	39.94
3816	NASDAQ	ATRC	Wed, Oct 7, 2020	39.88	40.92	39.77	40.18
3815	NASDAQ	ATRC	Tue, Oct 6, 2020	39.15	40.15	39.00	39.60
3814	NASDAQ	ATRC	Mon, Oct 5, 2020	38.24	39.17	37.90	39.16
3813	NASDAQ	ATRC	Fri, Oct 2, 2020	37.51	38.73	37.42	37.86
3812	NASDAQ	ATRC	Thu, Oct 1, 2020	40.25	40.33	37.86	38.26
3811	NASDAQ	ATRC	Wed, Sep 30, 2020	36.68	40.23	34.12	39.90
3810	NASDAQ	ATRC	Tue, Sep 29, 2020	40.54	40.64	39.54	40.02
3809	NASDAQ	ATRC	Mon, Sep 28, 2020	40.68	40.73	39.80	40.36
3808	NASDAQ	ATRC	Fri, Sep 25, 2020	38.44	40.17	38.03	40.07
3807	NASDAQ	ATRC	Thu, Sep 24, 2020	38.44	38.48	37.19	38.36
3806	NASDAQ	ATRC	Wed, Sep 23, 2020	38.79	39.25	37.55	38.52
3805	NASDAQ	ATRC	Tue, Sep 22, 2020	38.60	39.39	37.66	39.03
3804	NASDAQ	ATRC	Mon, Sep 21, 2020	39.17	40.58	37.81	38.65
3803	NASDAQ	ATRC	Fri, Sep 18, 2020	40.40	41.23	39.59	39.99
3802	NASDAQ	ATRC	Thu, Sep 17, 2020	40.65	41.13	38.51	39.89
3801	NASDAQ	ATRC	Wed, Sep 16, 2020	42.35	42.77	41.08	41.24
3800	NASDAQ	ATRC	Tue, Sep 15, 2020	42.21	42.59	41.69	41.99
3799	NASDAQ	ATRC	Mon, Sep 14, 2020	41.02	42.82	40.99	41.80
3798	NASDAQ	ATRC	Fri, Sep 11, 2020	41.92	42.54	40.08	40.66
3797	NASDAQ	ATRC	Thu, Sep 10, 2020	42.54	43.18	41.81	41.82
3796	NASDAQ	ATRC	Wed, Sep 9, 2020	42.25	43.03	41.93	42.32
3795	NASDAQ	ATRC	Tue, Sep 8, 2020	42.51	42.80	41.66	41.82
3794	NASDAQ	ATRC	Fri, Sep 4, 2020	43.92	43.93	41.92	42.93
3793	NASDAQ	ATRC	Thu, Sep 3, 2020	44.44	44.44	42.55	43.50
3792	NASDAQ	ATRC	Wed, Sep 2, 2020	45.16	45.23	44.56	44.63
3791	NASDAQ	ATRC	Tue, Sep 1, 2020	44.62	45.83	43.83	44.89
3790	NASDAQ	ATRC	Mon, Aug 31, 2020	42.64	44.95	42.38	44.73
3789	NASDAQ	ATRC	Fri, Aug 28, 2020	41.95	42.71	41.59	42.52
3788	NASDAQ	ATRC	Thu, Aug 27, 2020	40.43	41.90	40.29	41.66
3787	NASDAQ	ATRC	Wed, Aug 26, 2020	41.16	41.16	39.13	40.30
3786	NASDAQ	ATRC	Tue, Aug 25, 2020	40.71	41.90	40.71	41.32
3785	NASDAQ	ATRC	Mon, Aug 24, 2020	40.66	41.55	40.18	40.68
3784	NASDAQ	ATRC	Fri, Aug 21, 2020	40.84	40.87	39.67	40.23
3783	NASDAQ	ATRC	Thu, Aug 20, 2020	40.80	41.52	40.37	40.92
3782	NASDAQ	ATRC	Wed, Aug 19, 2020	41.68	41.97	40.85	41.05
3781	NASDAQ	ATRC	Tue, Aug 18, 2020	41.91	42.10	41.34	41.67
3780	NASDAQ	ATRC	Mon, Aug 17, 2020	40.57	42.22	40.24	41.84
3779	NASDAQ	ATRC	Fri, Aug 14, 2020	40.17	40.56	39.51	40.21
3778	NASDAQ	ATRC	Thu, Aug 13, 2020	40.77	41.15	40.10	40.41
3777	NASDAQ	ATRC	Wed, Aug 12, 2020	41.50	42.15	40.66	40.78
3776	NASDAQ	ATRC	Tue, Aug 11, 2020	42.29	42.29	40.70	41.01
3775	NASDAQ	ATRC	Mon, Aug 10, 2020	42.48	43.08	42.12	42.19
3774	NASDAQ	ATRC	Fri, Aug 7, 2020	41.90	43.28	41.81	42.53
3773	NASDAQ	ATRC	Thu, Aug 6, 2020	42.43	43.25	42.05	42.48
3772	NASDAQ	ATRC	Wed, Aug 5, 2020	41.58	42.70	41.16	42.56
3771	NASDAQ	ATRC	Tue, Aug 4, 2020	41.31	42.08	40.79	41.26
3770	NASDAQ	ATRC	Mon, Aug 3, 2020	40.94	42.02	40.37	41.63
3769	NASDAQ	ATRC	Fri, Jul 31, 2020	42.02	42.22	40.18	40.81
3768	NASDAQ	ATRC	Thu, Jul 30, 2020	41.64	42.85	41.64	42.28
3767	NASDAQ	ATRC	Wed, Jul 29, 2020	44.66	44.67	41.28	42.38
3766	NASDAQ	ATRC	Tue, Jul 28, 2020	45.36	45.66	44.44	44.67
3765	NASDAQ	ATRC	Mon, Jul 27, 2020	44.62	45.83	44.22	45.68
3764	NASDAQ	ATRC	Fri, Jul 24, 2020	44.84	45.02	43.81	44.59
3763	NASDAQ	ATRC	Thu, Jul 23, 2020	45.15	46.42	44.70	44.99
3762	NASDAQ	ATRC	Wed, Jul 22, 2020	45.47	45.87	45.06	45.19
3761	NASDAQ	ATRC	Tue, Jul 21, 2020	45.94	46.25	45.27	45.68
3760	NASDAQ	ATRC	Mon, Jul 20, 2020	46.25	46.97	45.01	45.57
3759	NASDAQ	ATRC	Fri, Jul 17, 2020	44.58	46.86	44.51	46.37
3758	NASDAQ	ATRC	Thu, Jul 16, 2020	46.60	46.70	44.48	44.61
3757	NASDAQ	ATRC	Wed, Jul 15, 2020	45.25	48.16	45.25	46.91
3756	NASDAQ	ATRC	Tue, Jul 14, 2020	43.08	44.54	42.15	44.53
3755	NASDAQ	ATRC	Mon, Jul 13, 2020	44.12	44.82	42.89	42.97
3754	NASDAQ	ATRC	Fri, Jul 10, 2020	44.29	44.29	43.12	43.74
3753	NASDAQ	ATRC	Thu, Jul 9, 2020	43.45	44.24	42.54	44.12
3752	NASDAQ	ATRC	Wed, Jul 8, 2020	43.16	44.40	43.05	43.53
3751	NASDAQ	ATRC	Tue, Jul 7, 2020	45.73	47.39	43.08	43.25
3750	NASDAQ	ATRC	Mon, Jul 6, 2020	47.67	47.67	46.02	46.20
3749	NASDAQ	ATRC	Thu, Jul 2, 2020	45.90	46.61	45.31	46.30
3748	NASDAQ	ATRC	Wed, Jul 1, 2020	44.90	45.62	44.37	45.27
3747	NASDAQ	ATRC	Tue, Jun 30, 2020	44.29	45.49	44.04	44.95
3746	NASDAQ	ATRC	Mon, Jun 29, 2020	44.19	44.97	43.83	44.50
3745	NASDAQ	ATRC	Fri, Jun 26, 2020	45.29	45.53	43.76	43.85
3744	NASDAQ	ATRC	Thu, Jun 25, 2020	44.21	45.45	43.87	45.45
3743	NASDAQ	ATRC	Wed, Jun 24, 2020	45.49	45.84	43.64	44.45
3742	NASDAQ	ATRC	Tue, Jun 23, 2020	46.79	47.51	45.89	45.89
3741	NASDAQ	ATRC	Mon, Jun 22, 2020	44.60	46.53	43.66	46.41
3740	NASDAQ	ATRC	Fri, Jun 19, 2020	45.54	46.29	44.33	44.56
3739	NASDAQ	ATRC	Thu, Jun 18, 2020	46.01	46.14	44.83	45.10
3738	NASDAQ	ATRC	Wed, Jun 17, 2020	46.47	46.93	46.02	46.18
3737	NASDAQ	ATRC	Tue, Jun 16, 2020	46.86	47.07	45.90	46.22
3736	NASDAQ	ATRC	Mon, Jun 15, 2020	43.85	46.03	43.44	45.69
3735	NASDAQ	ATRC	Fri, Jun 12, 2020	45.39	46.10	43.70	44.60
3734	NASDAQ	ATRC	Thu, Jun 11, 2020	45.97	47.16	44.21	44.23
3733	NASDAQ	ATRC	Wed, Jun 10, 2020	48.64	48.64	47.02	47.28
3732	NASDAQ	ATRC	Tue, Jun 9, 2020	50.37	50.98	48.35	48.49
3731	NASDAQ	ATRC	Mon, Jun 8, 2020	49.89	51.38	49.28	51.19
3730	NASDAQ	ATRC	Fri, Jun 5, 2020	48.05	50.82	47.80	50.27
3729	NASDAQ	ATRC	Thu, Jun 4, 2020	47.82	48.43	46.72	47.31
3728	NASDAQ	ATRC	Wed, Jun 3, 2020	45.01	48.63	45.01	48.35
3727	NASDAQ	ATRC	Tue, Jun 2, 2020	46.97	46.97	44.73	44.94
3726	NASDAQ	ATRC	Mon, Jun 1, 2020	48.14	48.14	46.85	46.94
3725	NASDAQ	ATRC	Fri, May 29, 2020	48.85	49.17	47.27	47.81
3724	NASDAQ	ATRC	Thu, May 28, 2020	49.93	49.93	48.31	48.56
3723	NASDAQ	ATRC	Wed, May 27, 2020	49.75	50.25	47.06	49.59
3722	NASDAQ	ATRC	Tue, May 26, 2020	51.00	51.19	49.12	49.21
3721	NASDAQ	ATRC	Fri, May 22, 2020	49.65	50.11	48.91	49.76
3720	NASDAQ	ATRC	Thu, May 21, 2020	50.75	50.75	48.95	49.52
3719	NASDAQ	ATRC	Wed, May 20, 2020	50.73	51.41	50.23	50.97
3718	NASDAQ	ATRC	Tue, May 19, 2020	50.54	51.50	49.92	49.93
3717	NASDAQ	ATRC	Mon, May 18, 2020	49.25	51.76	49.25	50.55
3716	NASDAQ	ATRC	Fri, May 15, 2020	47.48	48.23	46.67	48.15
3715	NASDAQ	ATRC	Thu, May 14, 2020	48.28	48.35	46.59	47.35
3714	NASDAQ	ATRC	Wed, May 13, 2020	46.77	49.37	46.35	48.80
3713	NASDAQ	ATRC	Tue, May 12, 2020	46.00	48.53	45.00	46.79
3712	NASDAQ	ATRC	Mon, May 11, 2020	45.00	46.53	44.32	46.03
3711	NASDAQ	ATRC	Fri, May 8, 2020	43.17	45.84	40.22	45.06
3710	NASDAQ	ATRC	Thu, May 7, 2020	41.50	41.96	41.11	41.84
3709	NASDAQ	ATRC	Wed, May 6, 2020	41.17	42.11	40.81	41.06
3708	NASDAQ	ATRC	Tue, May 5, 2020	42.41	42.89	40.99	41.07
3707	NASDAQ	ATRC	Mon, May 4, 2020	42.80	44.04	39.83	41.03
3706	NASDAQ	ATRC	Fri, May 1, 2020	42.50	43.86	41.00	43.56
3705	NASDAQ	ATRC	Thu, Apr 30, 2020	42.00	43.70	41.43	43.12
3704	NASDAQ	ATRC	Wed, Apr 29, 2020	39.96	41.97	39.75	41.39
3703	NASDAQ	ATRC	Tue, Apr 28, 2020	39.34	40.49	37.90	39.19
3702	NASDAQ	ATRC	Mon, Apr 27, 2020	38.52	39.11	37.63	38.79
3701	NASDAQ	ATRC	Fri, Apr 24, 2020	39.09	39.62	38.24	38.24
3700	NASDAQ	ATRC	Thu, Apr 23, 2020	39.99	40.08	38.74	38.74
3699	NASDAQ	ATRC	Wed, Apr 22, 2020	40.68	40.69	39.62	39.76
3698	NASDAQ	ATRC	Tue, Apr 21, 2020	39.62	40.76	39.26	40.00
3697	NASDAQ	ATRC	Mon, Apr 20, 2020	38.60	40.67	38.60	40.43
3696	NASDAQ	ATRC	Fri, Apr 17, 2020	37.94	40.26	37.41	39.83
3695	NASDAQ	ATRC	Thu, Apr 16, 2020	37.14	37.82	36.32	37.02
3694	NASDAQ	ATRC	Wed, Apr 15, 2020	37.07	37.95	36.17	36.84
3693	NASDAQ	ATRC	Tue, Apr 14, 2020	38.00	38.92	36.98	38.12
3692	NASDAQ	ATRC	Mon, Apr 13, 2020	36.05	37.58	35.64	37.35
3691	NASDAQ	ATRC	Thu, Apr 9, 2020	36.42	36.46	33.71	36.25
3690	NASDAQ	ATRC	Wed, Apr 8, 2020	37.48	38.15	36.06	36.34
3689	NASDAQ	ATRC	Tue, Apr 7, 2020	35.00	37.19	34.22	36.73
3688	NASDAQ	ATRC	Mon, Apr 6, 2020	32.88	34.45	32.17	34.17
3687	NASDAQ	ATRC	Fri, Apr 3, 2020	32.80	33.38	30.66	31.78
3686	NASDAQ	ATRC	Thu, Apr 2, 2020	31.99	33.82	31.64	32.99
3685	NASDAQ	ATRC	Wed, Apr 1, 2020	32.47	33.34	31.59	32.38
3684	NASDAQ	ATRC	Tue, Mar 31, 2020	32.58	33.80	32.26	33.59
3683	NASDAQ	ATRC	Mon, Mar 30, 2020	30.71	33.09	30.38	32.72
3682	NASDAQ	ATRC	Fri, Mar 27, 2020	29.23	31.67	28.74	30.63
3681	NASDAQ	ATRC	Thu, Mar 26, 2020	29.83	30.85	28.59	30.39
3680	NASDAQ	ATRC	Wed, Mar 25, 2020	28.67	30.76	28.33	29.44
3679	NASDAQ	ATRC	Tue, Mar 24, 2020	28.02	30.39	26.98	28.77
3678	NASDAQ	ATRC	Mon, Mar 23, 2020	25.53	26.46	24.30	26.27
3677	NASDAQ	ATRC	Fri, Mar 20, 2020	27.39	28.53	24.81	25.07
3676	NASDAQ	ATRC	Thu, Mar 19, 2020	24.63	27.60	24.63	27.23
3675	NASDAQ	ATRC	Wed, Mar 18, 2020	25.38	27.20	23.17	24.49
3674	NASDAQ	ATRC	Tue, Mar 17, 2020	25.72	27.26	24.15	27.02
3673	NASDAQ	ATRC	Mon, Mar 16, 2020	27.51	28.34	24.77	25.34
3672	NASDAQ	ATRC	Fri, Mar 13, 2020	31.60	31.99	28.94	30.43
3671	NASDAQ	ATRC	Thu, Mar 12, 2020	33.45	34.16	30.02	30.57
3670	NASDAQ	ATRC	Wed, Mar 11, 2020	36.53	36.61	34.57	35.28
3669	NASDAQ	ATRC	Tue, Mar 10, 2020	36.50	37.43	35.86	37.21
3668	NASDAQ	ATRC	Mon, Mar 9, 2020	35.02	37.36	34.70	35.60
3667	NASDAQ	ATRC	Fri, Mar 6, 2020	37.12	37.58	35.90	36.97
3666	NASDAQ	ATRC	Thu, Mar 5, 2020	38.57	38.90	37.68	38.04
3665	NASDAQ	ATRC	Wed, Mar 4, 2020	38.88	39.76	38.13	38.99
3664	NASDAQ	ATRC	Tue, Mar 3, 2020	39.03	39.80	37.61	38.22
3663	NASDAQ	ATRC	Mon, Mar 2, 2020	38.20	39.54	38.12	39.11
3662	NASDAQ	ATRC	Fri, Feb 28, 2020	39.10	39.58	37.20	38.42
3661	NASDAQ	ATRC	Thu, Feb 27, 2020	39.18	40.90	38.81	40.01
3660	NASDAQ	ATRC	Wed, Feb 26, 2020	38.75	40.03	38.75	39.95
3659	NASDAQ	ATRC	Tue, Feb 25, 2020	38.70	38.99	37.82	38.78
3658	NASDAQ	ATRC	Mon, Feb 24, 2020	38.16	38.98	37.85	38.43
3657	NASDAQ	ATRC	Fri, Feb 21, 2020	40.60	40.60	38.80	39.41
3656	NASDAQ	ATRC	Thu, Feb 20, 2020	41.68	41.98	40.52	40.70
3655	NASDAQ	ATRC	Wed, Feb 19, 2020	42.33	43.04	40.72	42.17
3654	NASDAQ	ATRC	Tue, Feb 18, 2020	43.73	44.51	43.11	43.16
3653	NASDAQ	ATRC	Fri, Feb 14, 2020	43.14	44.32	42.92	43.84
3652	NASDAQ	ATRC	Thu, Feb 13, 2020	42.60	43.58	42.42	43.04
3651	NASDAQ	ATRC	Wed, Feb 12, 2020	42.25	42.92	42.02	42.66
3650	NASDAQ	ATRC	Tue, Feb 11, 2020	41.89	42.08	41.08	42.04
3649	NASDAQ	ATRC	Mon, Feb 10, 2020	40.32	41.59	40.32	41.59
3648	NASDAQ	ATRC	Fri, Feb 7, 2020	39.11	40.75	38.94	40.60
3647	NASDAQ	ATRC	Thu, Feb 6, 2020	38.83	39.60	38.61	39.27
3646	NASDAQ	ATRC	Wed, Feb 5, 2020	39.83	39.95	38.54	38.63
3645	NASDAQ	ATRC	Tue, Feb 4, 2020	39.35	39.55	38.46	39.50
3644	NASDAQ	ATRC	Mon, Feb 3, 2020	38.81	39.25	38.18	38.66
3643	NASDAQ	ATRC	Fri, Jan 31, 2020	40.15	40.61	38.70	38.90
3642	NASDAQ	ATRC	Thu, Jan 30, 2020	39.61	40.86	39.61	40.35
3641	NASDAQ	ATRC	Wed, Jan 29, 2020	39.20	40.23	39.12	39.98
3640	NASDAQ	ATRC	Tue, Jan 28, 2020	38.38	39.35	38.34	39.11
3639	NASDAQ	ATRC	Mon, Jan 27, 2020	37.03	38.10	36.60	37.90
3638	NASDAQ	ATRC	Fri, Jan 24, 2020	37.88	38.53	37.50	37.57
3637	NASDAQ	ATRC	Thu, Jan 23, 2020	38.01	38.44	37.44	37.50
3636	NASDAQ	ATRC	Wed, Jan 22, 2020	38.89	39.25	38.03	38.18
3635	NASDAQ	ATRC	Tue, Jan 21, 2020	38.44	38.88	37.66	38.65
3634	NASDAQ	ATRC	Fri, Jan 17, 2020	37.01	38.26	36.42	38.25
3633	NASDAQ	ATRC	Thu, Jan 16, 2020	35.51	36.75	35.45	36.74
3632	NASDAQ	ATRC	Wed, Jan 15, 2020	33.81	35.34	33.80	35.30
3631	NASDAQ	ATRC	Tue, Jan 14, 2020	33.57	34.39	33.42	33.88
3630	NASDAQ	ATRC	Mon, Jan 13, 2020	33.92	33.92	33.12	33.50
3629	NASDAQ	ATRC	Fri, Jan 10, 2020	33.78	33.93	33.38	33.81
3628	NASDAQ	ATRC	Thu, Jan 9, 2020	33.01	33.88	32.81	33.71
3627	NASDAQ	ATRC	Wed, Jan 8, 2020	32.66	32.91	32.17	32.66
3626	NASDAQ	ATRC	Tue, Jan 7, 2020	32.72	32.76	32.15	32.58
3625	NASDAQ	ATRC	Mon, Jan 6, 2020	32.31	32.96	31.79	32.73
3624	NASDAQ	ATRC	Fri, Jan 3, 2020	32.67	32.96	32.07	32.46
3623	NASDAQ	ATRC	Thu, Jan 2, 2020	32.74	33.10	32.55	33.07
3622	NASDAQ	ATRC	Tue, Dec 31, 2019	32.18	32.80	32.18	32.51
3621	NASDAQ	ATRC	Mon, Dec 30, 2019	32.01	32.62	31.77	32.33
3620	NASDAQ	ATRC	Fri, Dec 27, 2019	32.32	32.33	31.85	32.04
3619	NASDAQ	ATRC	Thu, Dec 26, 2019	31.91	32.22	31.69	32.14
3618	NASDAQ	ATRC	Tue, Dec 24, 2019	31.81	31.94	31.47	31.84
3617	NASDAQ	ATRC	Mon, Dec 23, 2019	31.11	31.72	30.66	31.69
3616	NASDAQ	ATRC	Fri, Dec 20, 2019	30.78	31.10	30.23	31.10
3615	NASDAQ	ATRC	Thu, Dec 19, 2019	30.55	30.76	30.07	30.71
3614	NASDAQ	ATRC	Wed, Dec 18, 2019	30.45	30.81	30.16	30.60
3613	NASDAQ	ATRC	Tue, Dec 17, 2019	30.62	30.93	30.16	30.47
3612	NASDAQ	ATRC	Mon, Dec 16, 2019	30.70	30.95	30.33	30.56
3611	NASDAQ	ATRC	Fri, Dec 13, 2019	30.68	30.95	30.48	30.49
3610	NASDAQ	ATRC	Thu, Dec 12, 2019	30.79	31.29	30.56	30.78
3609	NASDAQ	ATRC	Wed, Dec 11, 2019	31.17	31.27	30.49	30.79
3608	NASDAQ	ATRC	Tue, Dec 10, 2019	30.33	31.21	30.02	31.20
3607	NASDAQ	ATRC	Mon, Dec 9, 2019	31.04	31.04	30.43	30.44
3606	NASDAQ	ATRC	Fri, Dec 6, 2019	29.95	31.12	29.82	31.01
3605	NASDAQ	ATRC	Thu, Dec 5, 2019	29.70	29.82	29.38	29.68
3604	NASDAQ	ATRC	Wed, Dec 4, 2019	29.85	29.85	29.52	29.65
3603	NASDAQ	ATRC	Tue, Dec 3, 2019	29.27	29.76	29.01	29.65
3602	NASDAQ	ATRC	Mon, Dec 2, 2019	29.94	30.07	29.51	29.61
3601	NASDAQ	ATRC	Fri, Nov 29, 2019	29.95	30.03	29.56	29.75
3600	NASDAQ	ATRC	Wed, Nov 27, 2019	30.03	30.05	29.45	29.93
3599	NASDAQ	ATRC	Tue, Nov 26, 2019	29.97	30.33	29.70	29.84
3598	NASDAQ	ATRC	Mon, Nov 25, 2019	29.01	30.01	29.01	29.85
3597	NASDAQ	ATRC	Fri, Nov 22, 2019	28.86	28.98	28.51	28.83
3596	NASDAQ	ATRC	Thu, Nov 21, 2019	29.04	29.07	28.47	28.68
3595	NASDAQ	ATRC	Wed, Nov 20, 2019	28.80	29.45	28.59	28.90
3594	NASDAQ	ATRC	Tue, Nov 19, 2019	28.45	29.05	28.36	28.89
3593	NASDAQ	ATRC	Mon, Nov 18, 2019	28.88	28.89	28.44	28.47
3592	NASDAQ	ATRC	Fri, Nov 15, 2019	28.34	28.99	28.30	28.93
3591	NASDAQ	ATRC	Thu, Nov 14, 2019	28.11	28.46	28.05	28.09
3590	NASDAQ	ATRC	Wed, Nov 13, 2019	27.95	28.29	27.87	28.13
3589	NASDAQ	ATRC	Tue, Nov 12, 2019	27.93	28.38	27.82	28.08
3588	NASDAQ	ATRC	Mon, Nov 11, 2019	27.95	28.18	27.60	27.89
3587	NASDAQ	ATRC	Fri, Nov 8, 2019	27.67	28.10	27.58	28.05
3586	NASDAQ	ATRC	Thu, Nov 7, 2019	28.41	28.54	27.75	27.85
3585	NASDAQ	ATRC	Wed, Nov 6, 2019	29.06	29.09	27.79	28.21
3584	NASDAQ	ATRC	Tue, Nov 5, 2019	28.63	29.38	28.36	29.05
3583	NASDAQ	ATRC	Mon, Nov 4, 2019	27.93	29.15	27.82	28.58
3582	NASDAQ	ATRC	Fri, Nov 1, 2019	26.79	28.15	26.79	27.91
3581	NASDAQ	ATRC	Thu, Oct 31, 2019	25.51	27.13	25.03	26.59
3580	NASDAQ	ATRC	Wed, Oct 30, 2019	27.41	27.41	26.59	27.15
3579	NASDAQ	ATRC	Tue, Oct 29, 2019	27.00	27.40	26.53	27.37
3578	NASDAQ	ATRC	Mon, Oct 28, 2019	26.61	27.28	26.61	27.03
3577	NASDAQ	ATRC	Fri, Oct 25, 2019	26.16	26.81	25.89	26.59
3576	NASDAQ	ATRC	Thu, Oct 24, 2019	26.39	26.61	25.99	26.22
3575	NASDAQ	ATRC	Wed, Oct 23, 2019	26.26	26.62	26.22	26.27
3574	NASDAQ	ATRC	Tue, Oct 22, 2019	26.47	26.76	26.21	26.26
3573	NASDAQ	ATRC	Mon, Oct 21, 2019	27.43	27.43	26.34	26.46
3572	NASDAQ	ATRC	Fri, Oct 18, 2019	27.30	27.64	27.12	27.26
3571	NASDAQ	ATRC	Thu, Oct 17, 2019	26.78	27.35	26.70	27.31
3570	NASDAQ	ATRC	Wed, Oct 16, 2019	26.32	26.79	26.32	26.65
3569	NASDAQ	ATRC	Tue, Oct 15, 2019	25.89	26.39	25.86	26.35
3568	NASDAQ	ATRC	Mon, Oct 14, 2019	25.89	26.03	25.51	25.76
3567	NASDAQ	ATRC	Fri, Oct 11, 2019	25.43	26.28	25.25	26.02
3566	NASDAQ	ATRC	Thu, Oct 10, 2019	25.07	25.35	24.92	25.22
3565	NASDAQ	ATRC	Wed, Oct 9, 2019	25.09	25.46	25.00	25.11
3564	NASDAQ	ATRC	Tue, Oct 8, 2019	25.37	25.67	24.77	24.99
3563	NASDAQ	ATRC	Mon, Oct 7, 2019	25.09	25.82	24.91	25.62
3562	NASDAQ	ATRC	Fri, Oct 4, 2019	24.56	25.19	24.33	25.16
3561	NASDAQ	ATRC	Thu, Oct 3, 2019	23.93	24.56	23.45	24.53
3560	NASDAQ	ATRC	Wed, Oct 2, 2019	23.99	24.38	23.84	24.06
3559	NASDAQ	ATRC	Tue, Oct 1, 2019	24.99	25.57	24.05	24.08
3558	NASDAQ	ATRC	Mon, Sep 30, 2019	24.71	25.34	24.51	24.94
3557	NASDAQ	ATRC	Fri, Sep 27, 2019	25.09	25.10	24.38	24.58
3556	NASDAQ	ATRC	Thu, Sep 26, 2019	25.34	25.51	24.56	24.89
3555	NASDAQ	ATRC	Wed, Sep 25, 2019	24.85	25.44	24.66	25.26
3554	NASDAQ	ATRC	Tue, Sep 24, 2019	25.23	25.36	24.88	24.93
3553	NASDAQ	ATRC	Mon, Sep 23, 2019	25.43	25.85	25.09	25.15
3552	NASDAQ	ATRC	Fri, Sep 20, 2019	25.97	26.00	25.50	25.61
3551	NASDAQ	ATRC	Thu, Sep 19, 2019	25.68	26.13	25.53	26.00
3550	NASDAQ	ATRC	Wed, Sep 18, 2019	26.00	26.28	25.59	25.79
3549	NASDAQ	ATRC	Tue, Sep 17, 2019	25.75	26.12	25.39	26.00
3548	NASDAQ	ATRC	Mon, Sep 16, 2019	25.53	25.95	25.11	25.74
3547	NASDAQ	ATRC	Fri, Sep 13, 2019	25.05	25.68	24.93	25.51
3546	NASDAQ	ATRC	Thu, Sep 12, 2019	24.89	25.26	24.50	25.04
3545	NASDAQ	ATRC	Wed, Sep 11, 2019	23.99	24.88	23.75	24.73
3544	NASDAQ	ATRC	Tue, Sep 10, 2019	23.91	24.70	23.56	23.88
3543	NASDAQ	ATRC	Mon, Sep 9, 2019	24.61	24.61	22.57	23.99
3542	NASDAQ	ATRC	Fri, Sep 6, 2019	24.07	25.83	23.27	24.58
3541	NASDAQ	ATRC	Thu, Sep 5, 2019	26.66	26.68	23.49	23.81
3540	NASDAQ	ATRC	Wed, Sep 4, 2019	26.44	26.77	25.74	26.33
3539	NASDAQ	ATRC	Tue, Sep 3, 2019	27.30	27.30	25.89	26.22
3538	NASDAQ	ATRC	Fri, Aug 30, 2019	27.51	27.84	27.30	27.39
3537	NASDAQ	ATRC	Thu, Aug 29, 2019	27.29	27.50	27.18	27.27
3536	NASDAQ	ATRC	Wed, Aug 28, 2019	26.76	27.25	26.48	27.05
3535	NASDAQ	ATRC	Tue, Aug 27, 2019	26.94	27.28	26.30	26.82
3534	NASDAQ	ATRC	Mon, Aug 26, 2019	26.69	27.00	26.46	26.76
3533	NASDAQ	ATRC	Fri, Aug 23, 2019	26.57	27.16	26.35	26.42
3532	NASDAQ	ATRC	Thu, Aug 22, 2019	27.26	27.31	26.38	26.70
3531	NASDAQ	ATRC	Wed, Aug 21, 2019	27.42	27.43	27.02	27.19
3530	NASDAQ	ATRC	Tue, Aug 20, 2019	27.34	28.03	27.03	27.17
3529	NASDAQ	ATRC	Mon, Aug 19, 2019	27.63	27.91	27.45	27.48
3528	NASDAQ	ATRC	Fri, Aug 16, 2019	27.06	27.48	27.06	27.32
3527	NASDAQ	ATRC	Thu, Aug 15, 2019	27.78	27.78	26.61	26.94
3526	NASDAQ	ATRC	Wed, Aug 14, 2019	28.60	29.21	27.77	27.84
3525	NASDAQ	ATRC	Tue, Aug 13, 2019	29.50	30.47	27.68	29.06
3524	NASDAQ	ATRC	Mon, Aug 12, 2019	30.78	31.30	29.49	30.62
3523	NASDAQ	ATRC	Fri, Aug 9, 2019	31.48	31.58	31.19	31.31
3522	NASDAQ	ATRC	Thu, Aug 8, 2019	30.44	31.59	30.23	31.46
3521	NASDAQ	ATRC	Wed, Aug 7, 2019	30.21	30.42	29.92	30.31
3520	NASDAQ	ATRC	Tue, Aug 6, 2019	30.32	30.53	29.67	30.47
3519	NASDAQ	ATRC	Mon, Aug 5, 2019	30.86	30.92	29.89	30.22
3518	NASDAQ	ATRC	Fri, Aug 2, 2019	32.25	32.27	31.13	31.58
3517	NASDAQ	ATRC	Thu, Aug 1, 2019	32.06	32.85	32.00	32.22
3516	NASDAQ	ATRC	Wed, Jul 31, 2019	32.58	33.00	31.03	32.08
3515	NASDAQ	ATRC	Tue, Jul 30, 2019	31.50	32.30	31.12	32.20
3514	NASDAQ	ATRC	Mon, Jul 29, 2019	31.86	31.86	31.17	31.67
3513	NASDAQ	ATRC	Fri, Jul 26, 2019	32.21	32.26	31.45	31.71
3512	NASDAQ	ATRC	Thu, Jul 25, 2019	32.50	32.51	31.93	31.99
3511	NASDAQ	ATRC	Wed, Jul 24, 2019	31.95	32.64	31.56	32.52
3510	NASDAQ	ATRC	Tue, Jul 23, 2019	31.76	32.18	31.49	31.95
3509	NASDAQ	ATRC	Mon, Jul 22, 2019	31.18	31.70	31.06	31.67
3508	NASDAQ	ATRC	Fri, Jul 19, 2019	31.39	31.99	31.12	31.15
3507	NASDAQ	ATRC	Thu, Jul 18, 2019	31.05	31.59	30.83	31.49
3506	NASDAQ	ATRC	Wed, Jul 17, 2019	30.77	31.10	30.65	30.96
3505	NASDAQ	ATRC	Tue, Jul 16, 2019	31.63	31.66	30.65	30.70
3504	NASDAQ	ATRC	Mon, Jul 15, 2019	31.38	31.66	31.07	31.53
3503	NASDAQ	ATRC	Fri, Jul 12, 2019	32.18	32.36	31.28	31.38
3502	NASDAQ	ATRC	Thu, Jul 11, 2019	32.01	32.21	31.50	32.14
3501	NASDAQ	ATRC	Wed, Jul 10, 2019	31.47	32.25	31.47	31.83
3500	NASDAQ	ATRC	Tue, Jul 9, 2019	31.23	31.79	30.99	31.46
3499	NASDAQ	ATRC	Mon, Jul 8, 2019	31.30	31.55	31.12	31.40
3498	NASDAQ	ATRC	Fri, Jul 5, 2019	31.44	31.63	31.17	31.41
3497	NASDAQ	ATRC	Wed, Jul 3, 2019	31.54	31.82	31.40	31.54
3496	NASDAQ	ATRC	Tue, Jul 2, 2019	30.68	31.39	30.43	31.30
3495	NASDAQ	ATRC	Mon, Jul 1, 2019	30.11	30.77	30.08	30.58
3494	NASDAQ	ATRC	Fri, Jun 28, 2019	29.46	29.95	29.41	29.84
3493	NASDAQ	ATRC	Thu, Jun 27, 2019	29.41	29.67	29.00	29.47
3492	NASDAQ	ATRC	Wed, Jun 26, 2019	30.38	30.54	29.22	29.28
3491	NASDAQ	ATRC	Tue, Jun 25, 2019	30.25	31.03	30.04	30.32
3490	NASDAQ	ATRC	Mon, Jun 24, 2019	30.01	30.51	30.01	30.21
3489	NASDAQ	ATRC	Fri, Jun 21, 2019	30.00	30.25	29.53	30.02
3488	NASDAQ	ATRC	Thu, Jun 20, 2019	30.74	30.92	30.17	30.29
3487	NASDAQ	ATRC	Wed, Jun 19, 2019	30.30	30.68	30.06	30.57
3486	NASDAQ	ATRC	Tue, Jun 18, 2019	30.05	30.45	29.83	30.27
3485	NASDAQ	ATRC	Mon, Jun 17, 2019	29.69	30.14	29.62	29.91
3484	NASDAQ	ATRC	Fri, Jun 14, 2019	29.99	30.07	29.51	29.61
3483	NASDAQ	ATRC	Thu, Jun 13, 2019	30.18	30.38	29.79	29.97
3482	NASDAQ	ATRC	Wed, Jun 12, 2019	29.81	30.49	29.80	30.03
3481	NASDAQ	ATRC	Tue, Jun 11, 2019	30.10	30.10	29.50	29.86
3480	NASDAQ	ATRC	Mon, Jun 10, 2019	29.35	30.12	29.35	29.87
3479	NASDAQ	ATRC	Fri, Jun 7, 2019	29.69	29.69	29.20	29.22
3478	NASDAQ	ATRC	Thu, Jun 6, 2019	29.54	29.73	29.05	29.53
3477	NASDAQ	ATRC	Wed, Jun 5, 2019	30.00	30.50	29.26	29.57
3476	NASDAQ	ATRC	Tue, Jun 4, 2019	29.60	30.00	29.51	29.97
3475	NASDAQ	ATRC	Mon, Jun 3, 2019	29.29	29.62	29.07	29.44
3474	NASDAQ	ATRC	Fri, May 31, 2019	29.65	29.65	28.92	29.30
3473	NASDAQ	ATRC	Thu, May 30, 2019	29.35	29.98	29.35	29.95
3472	NASDAQ	ATRC	Wed, May 29, 2019	29.54	29.86	29.18	29.42
3471	NASDAQ	ATRC	Tue, May 28, 2019	29.59	30.10	29.59	29.84
3470	NASDAQ	ATRC	Fri, May 24, 2019	29.37	29.85	29.28	29.51
3469	NASDAQ	ATRC	Thu, May 23, 2019	29.45	29.67	28.99	29.31
3468	NASDAQ	ATRC	Wed, May 22, 2019	29.75	29.94	29.55	29.70
3467	NASDAQ	ATRC	Tue, May 21, 2019	29.58	30.05	29.57	29.84
3466	NASDAQ	ATRC	Mon, May 20, 2019	29.19	29.61	28.94	29.41
3465	NASDAQ	ATRC	Fri, May 17, 2019	29.53	29.88	29.25	29.42
3464	NASDAQ	ATRC	Thu, May 16, 2019	29.39	29.99	29.37	29.71
3463	NASDAQ	ATRC	Wed, May 15, 2019	28.91	29.58	28.87	29.41
3462	NASDAQ	ATRC	Tue, May 14, 2019	29.14	29.27	29.00	29.13
3461	NASDAQ	ATRC	Mon, May 13, 2019	29.08	29.25	28.80	29.07
3460	NASDAQ	ATRC	Fri, May 10, 2019	29.56	30.33	28.80	29.61
3459	NASDAQ	ATRC	Thu, May 9, 2019	29.49	29.76	28.99	29.73
3458	NASDAQ	ATRC	Wed, May 8, 2019	30.32	30.39	29.67	29.71
3457	NASDAQ	ATRC	Tue, May 7, 2019	30.49	30.82	30.15	30.40
3456	NASDAQ	ATRC	Mon, May 6, 2019	30.02	30.85	29.89	30.74
3455	NASDAQ	ATRC	Fri, May 3, 2019	30.21	30.54	29.88	30.10
3454	NASDAQ	ATRC	Thu, May 2, 2019	29.63	30.12	29.63	30.08
3453	NASDAQ	ATRC	Wed, May 1, 2019	30.01	30.14	29.50	29.59
3452	NASDAQ	ATRC	Tue, Apr 30, 2019	30.00	30.21	29.61	30.02
3451	NASDAQ	ATRC	Mon, Apr 29, 2019	29.10	29.98	28.94	29.96
3450	NASDAQ	ATRC	Fri, Apr 26, 2019	29.96	29.96	28.50	29.30
3449	NASDAQ	ATRC	Thu, Apr 25, 2019	27.95	28.41	27.60	28.17
3448	NASDAQ	ATRC	Wed, Apr 24, 2019	27.77	28.73	27.77	27.96
3447	NASDAQ	ATRC	Tue, Apr 23, 2019	27.31	27.90	26.97	27.83
3446	NASDAQ	ATRC	Mon, Apr 22, 2019	27.02	27.74	27.02	27.30
3445	NASDAQ	ATRC	Thu, Apr 18, 2019	27.06	27.35	26.43	27.14
3444	NASDAQ	ATRC	Wed, Apr 17, 2019	28.39	28.70	26.85	27.23
3443	NASDAQ	ATRC	Tue, Apr 16, 2019	27.57	28.49	27.25	28.38
3442	NASDAQ	ATRC	Mon, Apr 15, 2019	27.97	28.04	27.33	27.43
3441	NASDAQ	ATRC	Fri, Apr 12, 2019	28.08	28.77	27.61	27.98
3440	NASDAQ	ATRC	Thu, Apr 11, 2019	27.65	27.96	27.16	27.65
3439	NASDAQ	ATRC	Wed, Apr 10, 2019	26.86	27.89	26.86	27.39
3438	NASDAQ	ATRC	Tue, Apr 9, 2019	27.66	27.93	26.84	26.85
3437	NASDAQ	ATRC	Mon, Apr 8, 2019	28.20	28.21	27.72	27.90
3436	NASDAQ	ATRC	Fri, Apr 5, 2019	28.43	28.63	28.05	28.26
3435	NASDAQ	ATRC	Thu, Apr 4, 2019	28.24	28.49	28.04	28.43
3434	NASDAQ	ATRC	Wed, Apr 3, 2019	28.30	28.69	28.02	28.23
3433	NASDAQ	ATRC	Tue, Apr 2, 2019	28.46	28.66	27.30	28.21
3432	NASDAQ	ATRC	Mon, Apr 1, 2019	27.09	27.39	26.89	27.37
3431	NASDAQ	ATRC	Fri, Mar 29, 2019	26.45	26.96	26.42	26.79
3430	NASDAQ	ATRC	Thu, Mar 28, 2019	27.46	27.71	26.11	26.38
3429	NASDAQ	ATRC	Wed, Mar 27, 2019	26.90	27.58	26.40	27.39
3428	NASDAQ	ATRC	Tue, Mar 26, 2019	28.56	28.78	26.88	27.06
3427	NASDAQ	ATRC	Mon, Mar 25, 2019	28.01	28.45	27.67	28.37
3426	NASDAQ	ATRC	Fri, Mar 22, 2019	28.50	28.50	27.52	28.00
3425	NASDAQ	ATRC	Thu, Mar 21, 2019	28.05	28.63	27.97	28.60
3424	NASDAQ	ATRC	Wed, Mar 20, 2019	28.68	28.75	28.00	28.20
3423	NASDAQ	ATRC	Tue, Mar 19, 2019	28.35	28.83	27.67	28.69
3422	NASDAQ	ATRC	Mon, Mar 18, 2019	29.04	29.17	27.86	28.33
3421	NASDAQ	ATRC	Fri, Mar 15, 2019	28.78	29.41	28.55	29.04
3420	NASDAQ	ATRC	Thu, Mar 14, 2019	29.37	29.54	28.72	28.74
3419	NASDAQ	ATRC	Wed, Mar 13, 2019	29.51	29.65	29.21	29.41
3418	NASDAQ	ATRC	Tue, Mar 12, 2019	29.36	29.56	29.06	29.35
3417	NASDAQ	ATRC	Mon, Mar 11, 2019	29.09	29.36	28.58	29.36
3416	NASDAQ	ATRC	Fri, Mar 8, 2019	29.13	29.51	28.60	29.00
3415	NASDAQ	ATRC	Thu, Mar 7, 2019	29.20	29.91	28.63	29.25
3414	NASDAQ	ATRC	Wed, Mar 6, 2019	29.94	30.02	29.12	29.25
3413	NASDAQ	ATRC	Tue, Mar 5, 2019	29.27	30.39	28.95	29.87
3412	NASDAQ	ATRC	Mon, Mar 4, 2019	30.66	30.88	28.50	29.27
3411	NASDAQ	ATRC	Fri, Mar 1, 2019	30.94	32.38	30.55	30.77
3410	NASDAQ	ATRC	Thu, Feb 28, 2019	32.62	32.62	31.86	31.94
3409	NASDAQ	ATRC	Wed, Feb 27, 2019	32.68	33.92	32.52	32.61
3408	NASDAQ	ATRC	Tue, Feb 26, 2019	32.85	32.85	32.25	32.79
3407	NASDAQ	ATRC	Mon, Feb 25, 2019	33.22	33.41	32.74	32.91
3406	NASDAQ	ATRC	Fri, Feb 22, 2019	32.96	33.61	32.64	33.20
3405	NASDAQ	ATRC	Thu, Feb 21, 2019	33.07	33.18	32.56	32.78
3404	NASDAQ	ATRC	Wed, Feb 20, 2019	32.74	33.20	31.91	33.08
3403	NASDAQ	ATRC	Tue, Feb 19, 2019	33.14	33.36	32.44	32.88
3402	NASDAQ	ATRC	Fri, Feb 15, 2019	33.14	33.64	32.74	33.19
3401	NASDAQ	ATRC	Thu, Feb 14, 2019	33.35	33.39	32.77	32.94
3400	NASDAQ	ATRC	Wed, Feb 13, 2019	32.08	33.36	31.83	33.34
3399	NASDAQ	ATRC	Tue, Feb 12, 2019	31.68	32.03	31.04	32.02
3398	NASDAQ	ATRC	Mon, Feb 11, 2019	31.46	31.66	31.18	31.32
3397	NASDAQ	ATRC	Fri, Feb 8, 2019	30.81	31.37	30.65	31.31
3396	NASDAQ	ATRC	Thu, Feb 7, 2019	31.09	31.64	30.85	30.97
3395	NASDAQ	ATRC	Wed, Feb 6, 2019	31.26	31.49	30.70	31.36
3394	NASDAQ	ATRC	Tue, Feb 5, 2019	31.03	31.72	30.21	31.30
3393	NASDAQ	ATRC	Mon, Feb 4, 2019	30.62	31.18	30.55	30.99
3392	NASDAQ	ATRC	Fri, Feb 1, 2019	30.82	31.31	30.06	30.75
3391	NASDAQ	ATRC	Thu, Jan 31, 2019	29.69	31.44	29.69	30.95
3390	NASDAQ	ATRC	Wed, Jan 30, 2019	29.58	29.90	29.40	29.59
3389	NASDAQ	ATRC	Tue, Jan 29, 2019	29.90	30.00	29.37	29.57
3388	NASDAQ	ATRC	Mon, Jan 28, 2019	31.10	31.10	29.67	29.72
3387	NASDAQ	ATRC	Fri, Jan 25, 2019	31.34	31.81	31.05	31.07
3386	NASDAQ	ATRC	Thu, Jan 24, 2019	31.01	31.40	30.89	31.24
3385	NASDAQ	ATRC	Wed, Jan 23, 2019	31.50	32.85	30.72	31.04
3384	NASDAQ	ATRC	Tue, Jan 22, 2019	31.58	31.89	30.90	31.23
3383	NASDAQ	ATRC	Fri, Jan 18, 2019	31.30	31.97	31.30	31.73
3382	NASDAQ	ATRC	Thu, Jan 17, 2019	30.79	31.65	30.30	31.22
3381	NASDAQ	ATRC	Wed, Jan 16, 2019	30.01	31.29	30.01	30.81
3380	NASDAQ	ATRC	Tue, Jan 15, 2019	29.66	30.31	29.60	30.16
3379	NASDAQ	ATRC	Mon, Jan 14, 2019	29.83	29.83	28.92	29.62
3378	NASDAQ	ATRC	Fri, Jan 11, 2019	30.01	30.13	29.65	29.84
3377	NASDAQ	ATRC	Thu, Jan 10, 2019	30.00	30.36	29.58	30.21
3376	NASDAQ	ATRC	Wed, Jan 9, 2019	30.57	31.73	30.11	30.15
3375	NASDAQ	ATRC	Tue, Jan 8, 2019	31.30	31.73	30.31	30.34
3374	NASDAQ	ATRC	Mon, Jan 7, 2019	31.22	32.00	29.75	30.81
3373	NASDAQ	ATRC	Fri, Jan 4, 2019	29.60	31.79	29.58	31.23
3372	NASDAQ	ATRC	Thu, Jan 3, 2019	30.03	30.19	29.09	29.20
3371	NASDAQ	ATRC	Wed, Jan 2, 2019	30.09	30.76	29.73	30.25
3370	NASDAQ	ATRC	Mon, Dec 31, 2018	30.13	30.63	29.87	30.60
3369	NASDAQ	ATRC	Fri, Dec 28, 2018	29.12	30.11	28.78	29.83
3368	NASDAQ	ATRC	Thu, Dec 27, 2018	28.06	29.06	27.09	29.04
3367	NASDAQ	ATRC	Wed, Dec 26, 2018	26.82	28.55	26.82	28.49
3366	NASDAQ	ATRC	Mon, Dec 24, 2018	26.64	27.10	26.64	26.66
3365	NASDAQ	ATRC	Fri, Dec 21, 2018	27.53	28.05	26.41	26.75
3364	NASDAQ	ATRC	Thu, Dec 20, 2018	28.10	28.30	26.70	27.38
3363	NASDAQ	ATRC	Wed, Dec 19, 2018	29.05	29.37	28.07	28.36
3362	NASDAQ	ATRC	Tue, Dec 18, 2018	29.67	29.85	28.88	28.90
3361	NASDAQ	ATRC	Mon, Dec 17, 2018	29.40	29.81	28.69	29.34
3360	NASDAQ	ATRC	Fri, Dec 14, 2018	30.15	30.63	29.26	29.47
3359	NASDAQ	ATRC	Thu, Dec 13, 2018	30.95	31.77	29.93	30.36
3358	NASDAQ	ATRC	Wed, Dec 12, 2018	31.09	31.77	30.78	30.83
3357	NASDAQ	ATRC	Tue, Dec 11, 2018	31.82	31.82	30.51	30.68
3356	NASDAQ	ATRC	Mon, Dec 10, 2018	31.62	31.96	30.56	31.27
3355	NASDAQ	ATRC	Fri, Dec 7, 2018	32.14	32.64	31.05	31.26
3354	NASDAQ	ATRC	Thu, Dec 6, 2018	31.91	32.98	31.58	32.18
3353	NASDAQ	ATRC	Tue, Dec 4, 2018	32.97	33.89	31.83	32.29
3352	NASDAQ	ATRC	Mon, Dec 3, 2018	33.79	34.39	32.82	33.02
3351	NASDAQ	ATRC	Fri, Nov 30, 2018	33.20	33.69	32.94	33.49
3350	NASDAQ	ATRC	Thu, Nov 29, 2018	33.55	33.77	33.06	33.20
3349	NASDAQ	ATRC	Wed, Nov 28, 2018	32.32	33.87	32.15	33.51
3348	NASDAQ	ATRC	Tue, Nov 27, 2018	31.95	32.29	31.73	32.11
3347	NASDAQ	ATRC	Mon, Nov 26, 2018	32.51	32.74	31.89	32.31
3346	NASDAQ	ATRC	Fri, Nov 23, 2018	31.78	32.43	31.68	32.16
3345	NASDAQ	ATRC	Wed, Nov 21, 2018	31.52	32.62	31.31	32.09
3344	NASDAQ	ATRC	Tue, Nov 20, 2018	30.23	31.66	30.16	31.35
3343	NASDAQ	ATRC	Mon, Nov 19, 2018	32.27	32.52	30.49	30.69
3342	NASDAQ	ATRC	Fri, Nov 16, 2018	31.67	32.56	31.28	32.22
3341	NASDAQ	ATRC	Thu, Nov 15, 2018	30.73	32.05	30.55	31.90
3340	NASDAQ	ATRC	Wed, Nov 14, 2018	30.69	30.94	30.38	30.86
3339	NASDAQ	ATRC	Tue, Nov 13, 2018	30.98	31.79	30.32	30.48
3338	NASDAQ	ATRC	Mon, Nov 12, 2018	32.73	32.73	30.63	30.94
3337	NASDAQ	ATRC	Fri, Nov 9, 2018	33.52	33.75	32.25	32.76
3336	NASDAQ	ATRC	Thu, Nov 8, 2018	32.67	33.95	32.67	33.65
3335	NASDAQ	ATRC	Wed, Nov 7, 2018	32.20	33.14	31.89	32.65
3334	NASDAQ	ATRC	Tue, Nov 6, 2018	31.94	32.75	31.83	32.04
3333	NASDAQ	ATRC	Mon, Nov 5, 2018	31.32	32.26	30.92	31.93
3332	NASDAQ	ATRC	Fri, Nov 2, 2018	32.00	33.71	29.66	31.35
3331	NASDAQ	ATRC	Thu, Nov 1, 2018	31.90	32.57	31.89	32.54
3330	NASDAQ	ATRC	Wed, Oct 31, 2018	31.44	32.04	31.37	31.81
3329	NASDAQ	ATRC	Tue, Oct 30, 2018	30.03	31.48	29.88	31.00
3328	NASDAQ	ATRC	Mon, Oct 29, 2018	29.92	30.58	29.62	30.12
3327	NASDAQ	ATRC	Fri, Oct 26, 2018	29.35	30.15	28.87	29.53
3326	NASDAQ	ATRC	Thu, Oct 25, 2018	29.00	30.22	28.55	29.71
3325	NASDAQ	ATRC	Wed, Oct 24, 2018	29.74	30.63	28.65	28.67
3324	NASDAQ	ATRC	Tue, Oct 23, 2018	29.44	30.34	28.82	29.90
3323	NASDAQ	ATRC	Mon, Oct 22, 2018	30.35	30.57	29.65	29.95
3322	NASDAQ	ATRC	Fri, Oct 19, 2018	32.46	32.59	30.24	30.29
3321	NASDAQ	ATRC	Thu, Oct 18, 2018	32.90	33.04	31.51	32.54
3320	NASDAQ	ATRC	Wed, Oct 17, 2018	31.58	33.03	31.37	32.90
3319	NASDAQ	ATRC	Tue, Oct 16, 2018	31.13	32.08	30.69	31.57
3318	NASDAQ	ATRC	Mon, Oct 15, 2018	30.73	31.15	30.02	30.85
3317	NASDAQ	ATRC	Fri, Oct 12, 2018	30.99	33.99	30.60	31.11
3316	NASDAQ	ATRC	Thu, Oct 11, 2018	30.49	31.23	29.83	30.01
3315	NASDAQ	ATRC	Wed, Oct 10, 2018	32.50	32.95	30.38	30.50
3314	NASDAQ	ATRC	Tue, Oct 9, 2018	32.65	33.63	32.14	32.50
3313	NASDAQ	ATRC	Mon, Oct 8, 2018	32.56	32.93	31.52	32.51
3312	NASDAQ	ATRC	Fri, Oct 5, 2018	31.55	33.45	31.46	33.02
3311	NASDAQ	ATRC	Thu, Oct 4, 2018	33.41	33.41	30.91	30.93
3310	NASDAQ	ATRC	Wed, Oct 3, 2018	33.80	34.00	33.14	33.69
3309	NASDAQ	ATRC	Tue, Oct 2, 2018	34.79	34.84	33.55	33.66
3308	NASDAQ	ATRC	Mon, Oct 1, 2018	36.49	36.49	34.60	34.85
3307	NASDAQ	ATRC	Fri, Sep 28, 2018	34.71	35.08	34.54	35.03
3306	NASDAQ	ATRC	Thu, Sep 27, 2018	34.77	34.88	34.34	34.73
3305	NASDAQ	ATRC	Wed, Sep 26, 2018	34.97	35.25	34.73	34.75
3304	NASDAQ	ATRC	Tue, Sep 25, 2018	35.46	35.71	35.04	35.20
3303	NASDAQ	ATRC	Mon, Sep 24, 2018	35.11	35.50	34.47	35.45
3302	NASDAQ	ATRC	Fri, Sep 21, 2018	35.55	35.66	34.68	35.25
3301	NASDAQ	ATRC	Thu, Sep 20, 2018	35.25	36.14	34.64	35.58
3300	NASDAQ	ATRC	Wed, Sep 19, 2018	34.33	35.51	33.30	35.44
3299	NASDAQ	ATRC	Tue, Sep 18, 2018	33.37	34.43	33.07	34.35
3298	NASDAQ	ATRC	Mon, Sep 17, 2018	33.85	33.85	32.52	33.27
3297	NASDAQ	ATRC	Fri, Sep 14, 2018	34.68	34.94	33.90	33.96
3296	NASDAQ	ATRC	Thu, Sep 13, 2018	34.05	34.98	33.74	34.78
3295	NASDAQ	ATRC	Wed, Sep 12, 2018	34.09	34.36	33.52	33.93
3294	NASDAQ	ATRC	Tue, Sep 11, 2018	33.68	34.63	33.37	34.18
3293	NASDAQ	ATRC	Mon, Sep 10, 2018	34.26	34.26	33.60	33.73
3292	NASDAQ	ATRC	Fri, Sep 7, 2018	34.28	34.94	34.06	34.20
3291	NASDAQ	ATRC	Thu, Sep 6, 2018	34.15	34.45	33.92	34.28
3290	NASDAQ	ATRC	Wed, Sep 5, 2018	34.65	34.66	33.50	34.14
3289	NASDAQ	ATRC	Tue, Sep 4, 2018	34.51	35.17	34.15	34.61
3288	NASDAQ	ATRC	Fri, Aug 31, 2018	34.51	34.70	34.16	34.55
3287	NASDAQ	ATRC	Thu, Aug 30, 2018	33.89	34.75	33.69	34.50
3286	NASDAQ	ATRC	Wed, Aug 29, 2018	33.99	34.50	33.88	33.92
3285	NASDAQ	ATRC	Tue, Aug 28, 2018	34.42	34.42	33.56	33.89
3284	NASDAQ	ATRC	Mon, Aug 27, 2018	34.10	34.67	33.80	34.28
3283	NASDAQ	ATRC	Fri, Aug 24, 2018	33.35	34.22	33.34	34.14
3282	NASDAQ	ATRC	Thu, Aug 23, 2018	32.96	33.99	32.50	33.44
3281	NASDAQ	ATRC	Wed, Aug 22, 2018	32.03	33.61	31.29	32.91
3280	NASDAQ	ATRC	Tue, Aug 21, 2018	31.10	32.15	31.10	31.85
3279	NASDAQ	ATRC	Mon, Aug 20, 2018	31.24	31.35	30.89	31.07
3278	NASDAQ	ATRC	Fri, Aug 17, 2018	30.64	31.20	30.44	31.09
3277	NASDAQ	ATRC	Thu, Aug 16, 2018	30.32	30.82	30.05	30.72
3276	NASDAQ	ATRC	Wed, Aug 15, 2018	30.84	30.84	30.04	30.26
3275	NASDAQ	ATRC	Tue, Aug 14, 2018	30.89	31.09	30.31	30.88
3274	NASDAQ	ATRC	Mon, Aug 13, 2018	31.12	31.38	30.50	30.80
3273	NASDAQ	ATRC	Fri, Aug 10, 2018	30.70	31.65	30.41	31.19
3272	NASDAQ	ATRC	Thu, Aug 9, 2018	30.55	31.00	30.41	30.91
3271	NASDAQ	ATRC	Wed, Aug 8, 2018	30.88	31.09	30.21	30.47
3270	NASDAQ	ATRC	Tue, Aug 7, 2018	30.72	31.12	30.25	30.74
3269	NASDAQ	ATRC	Mon, Aug 6, 2018	31.76	32.05	30.45	30.71
3268	NASDAQ	ATRC	Fri, Aug 3, 2018	32.27	32.83	31.29	32.10
3267	NASDAQ	ATRC	Thu, Aug 2, 2018	30.80	33.01	30.20	31.85
3266	NASDAQ	ATRC	Wed, Aug 1, 2018	28.76	29.50	28.57	29.30
3265	NASDAQ	ATRC	Tue, Jul 31, 2018	27.61	28.74	27.31	28.65
3264	NASDAQ	ATRC	Mon, Jul 30, 2018	27.81	28.02	27.34	27.62
3263	NASDAQ	ATRC	Fri, Jul 27, 2018	28.80	28.80	27.52	27.80
3262	NASDAQ	ATRC	Thu, Jul 26, 2018	28.73	28.96	28.31	28.67
3261	NASDAQ	ATRC	Wed, Jul 25, 2018	28.47	29.09	28.33	28.78
3260	NASDAQ	ATRC	Tue, Jul 24, 2018	29.47	29.47	28.35	28.49
3259	NASDAQ	ATRC	Mon, Jul 23, 2018	29.76	30.40	29.16	29.48
3258	NASDAQ	ATRC	Fri, Jul 20, 2018	29.91	30.83	29.62	29.70
3257	NASDAQ	ATRC	Thu, Jul 19, 2018	29.01	29.56	28.97	29.32
3256	NASDAQ	ATRC	Wed, Jul 18, 2018	29.29	29.84	28.85	29.01
3255	NASDAQ	ATRC	Tue, Jul 17, 2018	28.67	29.35	28.67	29.28
3254	NASDAQ	ATRC	Mon, Jul 16, 2018	28.99	28.99	28.19	28.77
3253	NASDAQ	ATRC	Fri, Jul 13, 2018	28.97	29.16	28.71	28.98
3252	NASDAQ	ATRC	Thu, Jul 12, 2018	28.92	29.28	28.62	28.93
3251	NASDAQ	ATRC	Wed, Jul 11, 2018	28.48	29.26	28.31	28.68
3250	NASDAQ	ATRC	Tue, Jul 10, 2018	28.49	28.75	28.20	28.71
3249	NASDAQ	ATRC	Mon, Jul 9, 2018	28.00	28.53	27.88	28.48
3248	NASDAQ	ATRC	Fri, Jul 6, 2018	28.47	28.95	27.91	27.95
3247	NASDAQ	ATRC	Thu, Jul 5, 2018	28.37	28.57	28.07	28.53
3246	NASDAQ	ATRC	Tue, Jul 3, 2018	28.21	28.58	27.89	28.14
3245	NASDAQ	ATRC	Mon, Jul 2, 2018	26.90	28.28	26.90	28.24
3244	NASDAQ	ATRC	Fri, Jun 29, 2018	27.01	27.32	26.81	27.05
3243	NASDAQ	ATRC	Thu, Jun 28, 2018	27.58	27.80	27.00	27.07
3242	NASDAQ	ATRC	Wed, Jun 27, 2018	28.24	29.11	27.47	27.47
3241	NASDAQ	ATRC	Tue, Jun 26, 2018	27.10	28.00	27.10	27.99
3240	NASDAQ	ATRC	Mon, Jun 25, 2018	27.66	28.06	26.63	26.97
3239	NASDAQ	ATRC	Fri, Jun 22, 2018	27.94	28.09	27.24	27.75
3238	NASDAQ	ATRC	Thu, Jun 21, 2018	27.93	28.76	27.51	27.94
3237	NASDAQ	ATRC	Wed, Jun 20, 2018	30.35	30.96	27.78	27.91
3236	NASDAQ	ATRC	Tue, Jun 19, 2018	28.65	30.46	28.51	30.28
3235	NASDAQ	ATRC	Mon, Jun 18, 2018	27.42	28.90	26.91	28.66
3234	NASDAQ	ATRC	Fri, Jun 15, 2018	25.42	27.22	25.36	26.99
3233	NASDAQ	ATRC	Thu, Jun 14, 2018	24.92	25.10	23.91	25.05
3232	NASDAQ	ATRC	Wed, Jun 13, 2018	24.63	24.95	23.93	24.88
3231	NASDAQ	ATRC	Tue, Jun 12, 2018	24.26	24.66	24.05	24.62
3230	NASDAQ	ATRC	Mon, Jun 11, 2018	24.22	24.37	24.13	24.26
3229	NASDAQ	ATRC	Fri, Jun 8, 2018	24.34	24.49	24.16	24.24
3228	NASDAQ	ATRC	Thu, Jun 7, 2018	25.00	25.08	24.17	24.33
3227	NASDAQ	ATRC	Wed, Jun 6, 2018	24.97	25.16	24.57	25.00
3226	NASDAQ	ATRC	Tue, Jun 5, 2018	24.33	24.94	24.13	24.93
3225	NASDAQ	ATRC	Mon, Jun 4, 2018	24.29	24.63	23.91	24.44
3224	NASDAQ	ATRC	Fri, Jun 1, 2018	23.84	24.29	23.63	24.22
3223	NASDAQ	ATRC	Thu, May 31, 2018	24.62	24.76	23.65	23.71
3222	NASDAQ	ATRC	Wed, May 30, 2018	24.36	24.97	24.13	24.54
3221	NASDAQ	ATRC	Tue, May 29, 2018	23.91	24.30	23.80	24.27
3220	NASDAQ	ATRC	Fri, May 25, 2018	23.84	24.31	23.61	24.16
3219	NASDAQ	ATRC	Thu, May 24, 2018	24.03	24.15	23.72	23.83
3218	NASDAQ	ATRC	Wed, May 23, 2018	23.89	24.38	23.56	24.05
3217	NASDAQ	ATRC	Tue, May 22, 2018	24.07	24.17	23.81	23.94
3216	NASDAQ	ATRC	Mon, May 21, 2018	24.15	24.34	23.61	24.06
3215	NASDAQ	ATRC	Fri, May 18, 2018	24.00	24.25	23.78	24.08
3214	NASDAQ	ATRC	Thu, May 17, 2018	23.90	24.12	23.66	24.00
3213	NASDAQ	ATRC	Wed, May 16, 2018	23.39	24.02	23.06	23.91
3212	NASDAQ	ATRC	Tue, May 15, 2018	23.34	23.88	22.92	23.37
3211	NASDAQ	ATRC	Mon, May 14, 2018	23.75	23.87	23.29	23.44
3210	NASDAQ	ATRC	Fri, May 11, 2018	23.54	23.83	23.17	23.74
3209	NASDAQ	ATRC	Thu, May 10, 2018	23.04	23.59	23.04	23.55
3208	NASDAQ	ATRC	Wed, May 9, 2018	22.88	23.04	22.45	23.00
3207	NASDAQ	ATRC	Tue, May 8, 2018	22.94	22.99	22.58	22.87
3206	NASDAQ	ATRC	Mon, May 7, 2018	22.88	23.07	22.50	22.95
3205	NASDAQ	ATRC	Fri, May 4, 2018	22.16	23.01	21.92	22.88
3204	NASDAQ	ATRC	Thu, May 3, 2018	22.10	22.27	20.63	22.25
3203	NASDAQ	ATRC	Wed, May 2, 2018	22.04	22.55	22.04	22.16
3202	NASDAQ	ATRC	Tue, May 1, 2018	21.98	22.29	21.79	22.04
3201	NASDAQ	ATRC	Mon, Apr 30, 2018	22.36	22.41	21.65	22.23
3200	NASDAQ	ATRC	Fri, Apr 27, 2018	21.00	23.69	20.75	22.38
3199	NASDAQ	ATRC	Thu, Apr 26, 2018	20.53	20.76	19.76	20.62
3198	NASDAQ	ATRC	Wed, Apr 25, 2018	20.45	20.53	19.98	20.44
3197	NASDAQ	ATRC	Tue, Apr 24, 2018	20.64	20.68	20.17	20.44
3196	NASDAQ	ATRC	Mon, Apr 23, 2018	21.28	21.28	20.43	20.57
3195	NASDAQ	ATRC	Fri, Apr 20, 2018	21.33	21.54	21.13	21.21
3194	NASDAQ	ATRC	Thu, Apr 19, 2018	21.57	21.57	21.22	21.33
3193	NASDAQ	ATRC	Wed, Apr 18, 2018	21.58	21.75	21.35	21.53
3192	NASDAQ	ATRC	Tue, Apr 17, 2018	21.21	21.57	21.09	21.53
3191	NASDAQ	ATRC	Mon, Apr 16, 2018	21.14	21.25	20.64	21.09
3190	NASDAQ	ATRC	Fri, Apr 13, 2018	20.98	21.02	20.49	21.01
3189	NASDAQ	ATRC	Thu, Apr 12, 2018	20.34	20.97	20.21	20.87
3188	NASDAQ	ATRC	Wed, Apr 11, 2018	19.58	20.28	19.22	20.19
3187	NASDAQ	ATRC	Tue, Apr 10, 2018	19.82	19.96	19.58	19.65
3186	NASDAQ	ATRC	Mon, Apr 9, 2018	20.04	20.04	19.58	19.65
3185	NASDAQ	ATRC	Fri, Apr 6, 2018	20.01	20.38	19.79	19.93
3184	NASDAQ	ATRC	Thu, Apr 5, 2018	20.46	20.46	19.93	20.06
3183	NASDAQ	ATRC	Wed, Apr 4, 2018	19.91	20.42	19.62	20.30
3182	NASDAQ	ATRC	Tue, Apr 3, 2018	20.14	20.46	19.39	20.10
3181	NASDAQ	ATRC	Mon, Apr 2, 2018	20.54	20.64	19.55	20.10
3180	NASDAQ	ATRC	Thu, Mar 29, 2018	20.15	20.80	19.88	20.52
3179	NASDAQ	ATRC	Wed, Mar 28, 2018	20.13	20.21	19.78	20.02
3178	NASDAQ	ATRC	Tue, Mar 27, 2018	20.01	20.43	19.56	20.09
3177	NASDAQ	ATRC	Mon, Mar 26, 2018	20.32	20.36	19.88	20.00
3176	NASDAQ	ATRC	Fri, Mar 23, 2018	19.75	20.11	19.73	20.04
3175	NASDAQ	ATRC	Thu, Mar 22, 2018	19.96	20.22	19.57	19.77
3174	NASDAQ	ATRC	Wed, Mar 21, 2018	19.80	20.16	19.72	20.07
3173	NASDAQ	ATRC	Tue, Mar 20, 2018	19.93	19.98	19.59	19.81
3172	NASDAQ	ATRC	Mon, Mar 19, 2018	20.92	20.92	19.61	19.83
3171	NASDAQ	ATRC	Fri, Mar 16, 2018	20.40	21.21	20.18	21.03
3170	NASDAQ	ATRC	Thu, Mar 15, 2018	20.25	20.34	19.96	20.31
3169	NASDAQ	ATRC	Wed, Mar 14, 2018	20.21	20.24	19.77	20.19
3168	NASDAQ	ATRC	Tue, Mar 13, 2018	20.15	20.25	19.87	19.99
3167	NASDAQ	ATRC	Mon, Mar 12, 2018	19.65	20.20	19.36	20.12
3166	NASDAQ	ATRC	Fri, Mar 9, 2018	19.50	20.08	19.31	19.65
3165	NASDAQ	ATRC	Thu, Mar 8, 2018	19.48	19.69	19.12	19.40
3164	NASDAQ	ATRC	Wed, Mar 7, 2018	18.70	19.50	18.70	19.45
3163	NASDAQ	ATRC	Tue, Mar 6, 2018	18.23	18.98	18.23	18.85
3162	NASDAQ	ATRC	Mon, Mar 5, 2018	18.53	18.86	17.84	18.26
3161	NASDAQ	ATRC	Fri, Mar 2, 2018	17.71	18.64	17.61	18.34
3160	NASDAQ	ATRC	Thu, Mar 1, 2018	17.67	17.92	17.36	17.71
3159	NASDAQ	ATRC	Wed, Feb 28, 2018	18.99	19.60	17.55	17.67
3158	NASDAQ	ATRC	Tue, Feb 27, 2018	18.32	19.79	18.13	18.99
3157	NASDAQ	ATRC	Mon, Feb 26, 2018	18.12	18.45	17.83	18.32
3156	NASDAQ	ATRC	Fri, Feb 23, 2018	18.33	18.43	17.59	18.00
3155	NASDAQ	ATRC	Thu, Feb 22, 2018	17.29	18.27	17.26	18.18
3154	NASDAQ	ATRC	Wed, Feb 21, 2018	16.96	17.55	16.96	17.22
3153	NASDAQ	ATRC	Tue, Feb 20, 2018	16.90	17.05	16.81	16.91
3152	NASDAQ	ATRC	Fri, Feb 16, 2018	17.39	17.53	16.83	16.96
3151	NASDAQ	ATRC	Thu, Feb 15, 2018	16.88	17.62	16.54	17.22
3150	NASDAQ	ATRC	Wed, Feb 14, 2018	15.58	16.86	15.58	16.72
3149	NASDAQ	ATRC	Tue, Feb 13, 2018	15.41	15.82	15.40	15.76
3148	NASDAQ	ATRC	Mon, Feb 12, 2018	15.37	15.91	15.14	15.52
3147	NASDAQ	ATRC	Fri, Feb 9, 2018	15.19	15.48	14.88	15.31
3146	NASDAQ	ATRC	Thu, Feb 8, 2018	15.86	16.13	15.04	15.05
3145	NASDAQ	ATRC	Wed, Feb 7, 2018	15.81	16.04	15.68	15.81
3144	NASDAQ	ATRC	Tue, Feb 6, 2018	15.38	16.21	15.06	15.87
3143	NASDAQ	ATRC	Mon, Feb 5, 2018	16.17	16.33	15.25	15.59
3142	NASDAQ	ATRC	Fri, Feb 2, 2018	16.40	16.46	16.19	16.25
3141	NASDAQ	ATRC	Thu, Feb 1, 2018	16.21	16.61	16.04	16.50
3140	NASDAQ	ATRC	Wed, Jan 31, 2018	16.97	16.97	16.29	16.31
3139	NASDAQ	ATRC	Tue, Jan 30, 2018	16.45	17.02	16.09	16.89
3138	NASDAQ	ATRC	Mon, Jan 29, 2018	17.08	17.14	16.50	16.63
3137	NASDAQ	ATRC	Fri, Jan 26, 2018	17.13	17.31	16.61	17.11
3136	NASDAQ	ATRC	Thu, Jan 25, 2018	17.65	17.78	17.01	17.13
3135	NASDAQ	ATRC	Wed, Jan 24, 2018	17.93	18.04	17.55	17.55
3134	NASDAQ	ATRC	Tue, Jan 23, 2018	17.93	18.00	17.69	17.91
3133	NASDAQ	ATRC	Mon, Jan 22, 2018	17.64	18.19	17.54	17.94
3132	NASDAQ	ATRC	Fri, Jan 19, 2018	17.58	17.83	17.44	17.60
3131	NASDAQ	ATRC	Thu, Jan 18, 2018	17.68	17.87	17.43	17.59
3130	NASDAQ	ATRC	Wed, Jan 17, 2018	17.76	17.95	17.55	17.71
3129	NASDAQ	ATRC	Tue, Jan 16, 2018	17.93	18.16	17.68	17.71
3128	NASDAQ	ATRC	Fri, Jan 12, 2018	17.68	17.88	17.53	17.73
3127	NASDAQ	ATRC	Thu, Jan 11, 2018	17.75	17.98	17.59	17.69
3126	NASDAQ	ATRC	Wed, Jan 10, 2018	17.87	17.87	17.61	17.69
3125	NASDAQ	ATRC	Tue, Jan 9, 2018	17.99	18.09	17.86	17.94
3124	NASDAQ	ATRC	Mon, Jan 8, 2018	17.99	18.09	17.71	17.96
3123	NASDAQ	ATRC	Fri, Jan 5, 2018	18.43	18.66	17.83	17.99
3122	NASDAQ	ATRC	Thu, Jan 4, 2018	18.49	18.50	18.18	18.39
3121	NASDAQ	ATRC	Wed, Jan 3, 2018	18.48	18.95	18.33	18.37
3120	NASDAQ	ATRC	Tue, Jan 2, 2018	18.25	18.48	18.08	18.47
3119	NASDAQ	ATRC	Fri, Dec 29, 2017	18.52	18.52	18.16	18.24
3118	NASDAQ	ATRC	Thu, Dec 28, 2017	18.36	18.53	18.24	18.45
3117	NASDAQ	ATRC	Wed, Dec 27, 2017	18.21	18.56	18.07	18.31
3116	NASDAQ	ATRC	Tue, Dec 26, 2017	18.22	18.32	18.00	18.17
3115	NASDAQ	ATRC	Fri, Dec 22, 2017	18.32	18.35	17.90	18.27
3114	NASDAQ	ATRC	Thu, Dec 21, 2017	18.23	18.46	18.19	18.31
3113	NASDAQ	ATRC	Wed, Dec 20, 2017	18.39	18.50	18.07	18.26
3112	NASDAQ	ATRC	Tue, Dec 19, 2017	18.40	18.60	17.74	18.34
3111	NASDAQ	ATRC	Mon, Dec 18, 2017	18.40	18.48	18.15	18.40
3110	NASDAQ	ATRC	Fri, Dec 15, 2017	18.03	18.47	17.80	18.32
3109	NASDAQ	ATRC	Thu, Dec 14, 2017	18.46	18.56	18.00	18.03
3108	NASDAQ	ATRC	Wed, Dec 13, 2017	18.45	18.86	18.23	18.46
3107	NASDAQ	ATRC	Tue, Dec 12, 2017	18.27	18.56	16.18	18.44
3106	NASDAQ	ATRC	Mon, Dec 11, 2017	18.01	18.33	17.46	18.25
3105	NASDAQ	ATRC	Fri, Dec 8, 2017	17.95	18.06	17.59	17.96
3104	NASDAQ	ATRC	Thu, Dec 7, 2017	17.24	18.15	17.24	17.95
3103	NASDAQ	ATRC	Wed, Dec 6, 2017	17.94	18.06	17.74	17.81
3102	NASDAQ	ATRC	Tue, Dec 5, 2017	18.15	18.28	17.90	17.90
3101	NASDAQ	ATRC	Mon, Dec 4, 2017	18.71	18.71	18.09	18.14
3100	NASDAQ	ATRC	Fri, Dec 1, 2017	18.49	18.68	18.12	18.52
3099	NASDAQ	ATRC	Thu, Nov 30, 2017	18.44	18.70	18.31	18.50
3098	NASDAQ	ATRC	Wed, Nov 29, 2017	18.02	18.67	18.02	18.38
3097	NASDAQ	ATRC	Tue, Nov 28, 2017	18.21	18.23	17.84	17.99
3096	NASDAQ	ATRC	Mon, Nov 27, 2017	18.29	18.29	17.91	18.16
3095	NASDAQ	ATRC	Fri, Nov 24, 2017	18.14	18.52	18.07	18.28
3094	NASDAQ	ATRC	Wed, Nov 22, 2017	18.21	18.77	18.00	18.07
3093	NASDAQ	ATRC	Tue, Nov 21, 2017	18.37	18.39	18.06	18.18
3092	NASDAQ	ATRC	Mon, Nov 20, 2017	18.12	18.39	18.01	18.20
3091	NASDAQ	ATRC	Fri, Nov 17, 2017	18.04	18.35	18.02	18.06
3090	NASDAQ	ATRC	Thu, Nov 16, 2017	17.71	18.37	17.62	18.17
3089	NASDAQ	ATRC	Wed, Nov 15, 2017	17.86	18.34	16.41	17.69
3088	NASDAQ	ATRC	Tue, Nov 14, 2017	18.15	18.35	17.65	17.94
3087	NASDAQ	ATRC	Mon, Nov 13, 2017	18.45	18.54	18.23	18.23
3086	NASDAQ	ATRC	Fri, Nov 10, 2017	18.66	18.99	18.49	18.60
3085	NASDAQ	ATRC	Thu, Nov 9, 2017	18.30	18.68	18.14	18.65
3084	NASDAQ	ATRC	Wed, Nov 8, 2017	18.63	18.85	18.10	18.39
3083	NASDAQ	ATRC	Tue, Nov 7, 2017	18.90	19.05	17.92	18.57
3082	NASDAQ	ATRC	Mon, Nov 6, 2017	20.09	20.29	18.79	18.81
3081	NASDAQ	ATRC	Fri, Nov 3, 2017	19.50	20.42	19.50	20.19
3080	NASDAQ	ATRC	Thu, Nov 2, 2017	17.58	20.43	16.88	19.58
3079	NASDAQ	ATRC	Wed, Nov 1, 2017	21.43	21.43	20.61	21.23
3078	NASDAQ	ATRC	Tue, Oct 31, 2017	21.17	21.54	20.86	21.44
3077	NASDAQ	ATRC	Mon, Oct 30, 2017	21.63	21.69	20.84	21.05
3076	NASDAQ	ATRC	Fri, Oct 27, 2017	21.50	21.90	21.28	21.81
3075	NASDAQ	ATRC	Thu, Oct 26, 2017	21.66	21.84	21.28	21.49
3074	NASDAQ	ATRC	Wed, Oct 25, 2017	21.68	21.75	21.21	21.67
3073	NASDAQ	ATRC	Tue, Oct 24, 2017	22.28	22.31	21.74	21.77
3072	NASDAQ	ATRC	Mon, Oct 23, 2017	22.81	22.81	22.24	22.26
3071	NASDAQ	ATRC	Fri, Oct 20, 2017	23.12	23.34	22.69	22.83
3070	NASDAQ	ATRC	Thu, Oct 19, 2017	23.07	23.08	22.77	22.90
3069	NASDAQ	ATRC	Wed, Oct 18, 2017	22.59	23.22	22.45	23.07
3068	NASDAQ	ATRC	Tue, Oct 17, 2017	22.48	22.90	22.36	22.46
3067	NASDAQ	ATRC	Mon, Oct 16, 2017	22.26	22.62	22.24	22.61
3066	NASDAQ	ATRC	Fri, Oct 13, 2017	22.34	22.65	22.23	22.28
3065	NASDAQ	ATRC	Thu, Oct 12, 2017	22.45	22.52	22.23	22.40
3064	NASDAQ	ATRC	Wed, Oct 11, 2017	22.70	22.70	22.22	22.44
3063	NASDAQ	ATRC	Tue, Oct 10, 2017	22.50	22.82	22.38	22.51
3062	NASDAQ	ATRC	Mon, Oct 9, 2017	23.44	23.73	22.45	22.50
3061	NASDAQ	ATRC	Fri, Oct 6, 2017	23.04	23.64	22.91	23.44
3060	NASDAQ	ATRC	Thu, Oct 5, 2017	23.01	23.13	22.90	22.99
3059	NASDAQ	ATRC	Wed, Oct 4, 2017	23.07	23.31	22.89	23.00
3058	NASDAQ	ATRC	Tue, Oct 3, 2017	23.35	23.35	22.61	22.99
3057	NASDAQ	ATRC	Mon, Oct 2, 2017	22.53	23.24	22.43	23.21
3056	NASDAQ	ATRC	Fri, Sep 29, 2017	22.37	22.59	22.27	22.37
3055	NASDAQ	ATRC	Thu, Sep 28, 2017	22.66	22.84	22.36	22.38
3054	NASDAQ	ATRC	Wed, Sep 27, 2017	22.10	22.85	21.97	22.66
3053	NASDAQ	ATRC	Tue, Sep 26, 2017	22.00	22.09	21.86	21.94
3052	NASDAQ	ATRC	Mon, Sep 25, 2017	22.00	22.01	21.70	21.97
3051	NASDAQ	ATRC	Fri, Sep 22, 2017	21.87	22.06	21.79	21.99
3050	NASDAQ	ATRC	Thu, Sep 21, 2017	21.64	21.80	21.44	21.79
3049	NASDAQ	ATRC	Wed, Sep 20, 2017	21.57	21.78	21.41	21.64
3048	NASDAQ	ATRC	Tue, Sep 19, 2017	21.55	21.69	21.26	21.51
3047	NASDAQ	ATRC	Mon, Sep 18, 2017	21.13	21.79	21.04	21.61
3046	NASDAQ	ATRC	Fri, Sep 15, 2017	20.85	21.44	20.58	21.04
3045	NASDAQ	ATRC	Thu, Sep 14, 2017	20.00	20.92	19.85	20.78
3044	NASDAQ	ATRC	Wed, Sep 13, 2017	20.00	20.29	19.87	20.03
3043	NASDAQ	ATRC	Tue, Sep 12, 2017	19.96	20.30	19.90	20.13
3042	NASDAQ	ATRC	Mon, Sep 11, 2017	20.22	20.30	19.88	20.00
3041	NASDAQ	ATRC	Fri, Sep 8, 2017	20.54	20.60	20.25	20.26
3040	NASDAQ	ATRC	Thu, Sep 7, 2017	20.65	20.68	20.11	20.54
3039	NASDAQ	ATRC	Wed, Sep 6, 2017	21.69	21.69	20.58	20.63
3038	NASDAQ	ATRC	Tue, Sep 5, 2017	22.36	22.49	21.58	21.67
3037	NASDAQ	ATRC	Fri, Sep 1, 2017	22.56	22.69	22.25	22.35
3036	NASDAQ	ATRC	Thu, Aug 31, 2017	22.03	22.58	22.03	22.43
3035	NASDAQ	ATRC	Wed, Aug 30, 2017	21.77	22.03	21.77	22.00
3034	NASDAQ	ATRC	Tue, Aug 29, 2017	21.51	21.92	21.42	21.88
3033	NASDAQ	ATRC	Mon, Aug 28, 2017	21.50	21.71	21.44	21.62
3032	NASDAQ	ATRC	Fri, Aug 25, 2017	21.70	21.81	21.32	21.34
3031	NASDAQ	ATRC	Thu, Aug 24, 2017	21.92	21.99	21.42	21.63
3030	NASDAQ	ATRC	Wed, Aug 23, 2017	22.44	22.61	21.82	21.83
3029	NASDAQ	ATRC	Tue, Aug 22, 2017	22.15	22.70	22.15	22.65
3028	NASDAQ	ATRC	Mon, Aug 21, 2017	22.40	22.72	22.04	22.14
3027	NASDAQ	ATRC	Fri, Aug 18, 2017	21.99	22.48	21.99	22.37
3026	NASDAQ	ATRC	Thu, Aug 17, 2017	22.60	22.68	22.16	22.18
3025	NASDAQ	ATRC	Wed, Aug 16, 2017	23.39	23.49	22.66	22.68
3024	NASDAQ	ATRC	Tue, Aug 15, 2017	23.39	23.57	23.30	23.40
3023	NASDAQ	ATRC	Mon, Aug 14, 2017	22.92	23.51	22.92	23.34
3022	NASDAQ	ATRC	Fri, Aug 11, 2017	22.66	23.20	22.55	22.80
3021	NASDAQ	ATRC	Thu, Aug 10, 2017	22.51	23.50	22.51	22.63
3020	NASDAQ	ATRC	Wed, Aug 9, 2017	22.64	22.86	22.52	22.61
3019	NASDAQ	ATRC	Tue, Aug 8, 2017	22.75	23.05	22.55	22.78
3018	NASDAQ	ATRC	Mon, Aug 7, 2017	22.51	22.95	22.29	22.89
3017	NASDAQ	ATRC	Fri, Aug 4, 2017	22.53	22.98	22.39	22.49
3016	NASDAQ	ATRC	Thu, Aug 3, 2017	22.82	22.92	22.40	22.47
3015	NASDAQ	ATRC	Wed, Aug 2, 2017	22.96	23.09	22.33	22.78
3014	NASDAQ	ATRC	Tue, Aug 1, 2017	24.25	24.46	22.95	23.04
3013	NASDAQ	ATRC	Mon, Jul 31, 2017	23.83	25.18	23.80	24.23
3012	NASDAQ	ATRC	Fri, Jul 28, 2017	22.73	24.39	21.95	23.84
3011	NASDAQ	ATRC	Thu, Jul 27, 2017	23.07	23.34	22.52	22.69
3010	NASDAQ	ATRC	Wed, Jul 26, 2017	23.49	23.52	23.05	23.14
3009	NASDAQ	ATRC	Tue, Jul 25, 2017	23.59	23.78	23.43	23.47
3008	NASDAQ	ATRC	Mon, Jul 24, 2017	23.69	23.86	23.32	23.58
3007	NASDAQ	ATRC	Fri, Jul 21, 2017	23.97	23.97	23.49	23.74
3006	NASDAQ	ATRC	Thu, Jul 20, 2017	23.98	23.99	23.56	23.87
3005	NASDAQ	ATRC	Wed, Jul 19, 2017	24.38	24.47	23.87	23.91
3004	NASDAQ	ATRC	Tue, Jul 18, 2017	24.80	24.84	24.34	24.36
3003	NASDAQ	ATRC	Mon, Jul 17, 2017	24.80	25.05	24.62	24.80
3002	NASDAQ	ATRC	Fri, Jul 14, 2017	24.36	24.98	24.35	24.73
3001	NASDAQ	ATRC	Thu, Jul 13, 2017	24.68	24.69	24.09	24.43
3000	NASDAQ	ATRC	Wed, Jul 12, 2017	24.75	25.11	24.68	24.88
2999	NASDAQ	ATRC	Tue, Jul 11, 2017	24.39	24.87	24.31	24.64
2998	NASDAQ	ATRC	Mon, Jul 10, 2017	24.40	24.50	24.03	24.40
2997	NASDAQ	ATRC	Fri, Jul 7, 2017	23.76	24.48	23.76	24.36
2996	NASDAQ	ATRC	Thu, Jul 6, 2017	23.86	24.20	23.42	23.75
2995	NASDAQ	ATRC	Wed, Jul 5, 2017	24.21	24.35	23.98	24.07
2994	NASDAQ	ATRC	Mon, Jul 3, 2017	24.47	24.75	24.03	24.18
2993	NASDAQ	ATRC	Fri, Jun 30, 2017	24.85	24.85	24.08	24.25
2992	NASDAQ	ATRC	Thu, Jun 29, 2017	24.46	24.68	24.08	24.65
2991	NASDAQ	ATRC	Wed, Jun 28, 2017	23.76	24.49	23.65	24.40
2990	NASDAQ	ATRC	Tue, Jun 27, 2017	23.94	23.94	23.27	23.57
2989	NASDAQ	ATRC	Mon, Jun 26, 2017	23.94	24.12	23.78	23.90
2988	NASDAQ	ATRC	Fri, Jun 23, 2017	23.33	23.94	23.11	23.91
2987	NASDAQ	ATRC	Thu, Jun 22, 2017	22.68	23.35	22.68	23.33
2986	NASDAQ	ATRC	Wed, Jun 21, 2017	22.86	23.04	22.63	22.78
2985	NASDAQ	ATRC	Tue, Jun 20, 2017	22.61	22.96	22.38	22.73
2984	NASDAQ	ATRC	Mon, Jun 19, 2017	21.99	22.83	21.89	22.69
2983	NASDAQ	ATRC	Fri, Jun 16, 2017	21.73	21.93	21.59	21.84
2982	NASDAQ	ATRC	Thu, Jun 15, 2017	21.74	21.93	21.60	21.92
2981	NASDAQ	ATRC	Wed, Jun 14, 2017	21.37	22.01	21.37	22.00
2980	NASDAQ	ATRC	Tue, Jun 13, 2017	21.43	21.65	21.08	21.39
2979	NASDAQ	ATRC	Mon, Jun 12, 2017	21.30	21.30	20.85	21.23
2978	NASDAQ	ATRC	Fri, Jun 9, 2017	21.46	21.77	21.17	21.37
2977	NASDAQ	ATRC	Thu, Jun 8, 2017	21.28	21.56	21.09	21.49
2976	NASDAQ	ATRC	Wed, Jun 7, 2017	21.08	21.32	20.89	21.32
2975	NASDAQ	ATRC	Tue, Jun 6, 2017	20.91	21.30	20.65	21.07
2974	NASDAQ	ATRC	Mon, Jun 5, 2017	21.36	21.58	20.77	21.08
2973	NASDAQ	ATRC	Fri, Jun 2, 2017	21.17	21.83	21.17	21.43
2972	NASDAQ	ATRC	Thu, Jun 1, 2017	20.93	21.20	20.26	21.19
2971	NASDAQ	ATRC	Wed, May 31, 2017	21.02	21.25	20.53	20.89
2970	NASDAQ	ATRC	Tue, May 30, 2017	20.93	21.90	20.61	20.96
2969	NASDAQ	ATRC	Fri, May 26, 2017	21.10	21.30	20.70	20.71
2968	NASDAQ	ATRC	Thu, May 25, 2017	21.56	21.86	21.05	21.07
2967	NASDAQ	ATRC	Wed, May 24, 2017	21.55	21.67	21.14	21.53
2966	NASDAQ	ATRC	Tue, May 23, 2017	21.66	21.66	21.28	21.54
2965	NASDAQ	ATRC	Mon, May 22, 2017	21.48	21.84	21.47	21.65
2964	NASDAQ	ATRC	Fri, May 19, 2017	21.20	21.83	21.16	21.50
2963	NASDAQ	ATRC	Thu, May 18, 2017	21.33	21.43	21.04	21.18
2962	NASDAQ	ATRC	Wed, May 17, 2017	21.57	21.83	21.21	21.30
2961	NASDAQ	ATRC	Tue, May 16, 2017	22.00	22.00	21.40	21.86
2960	NASDAQ	ATRC	Mon, May 15, 2017	21.78	22.01	21.71	21.97
2959	NASDAQ	ATRC	Fri, May 12, 2017	21.56	22.00	21.32	21.79
2958	NASDAQ	ATRC	Thu, May 11, 2017	22.03	22.39	21.45	21.57
2957	NASDAQ	ATRC	Wed, May 10, 2017	22.15	22.27	21.68	22.03
2956	NASDAQ	ATRC	Tue, May 9, 2017	22.75	22.77	22.16	22.18
2955	NASDAQ	ATRC	Mon, May 8, 2017	22.95	23.95	21.92	22.79
2954	NASDAQ	ATRC	Fri, May 5, 2017	22.00	23.31	21.23	23.00
2953	NASDAQ	ATRC	Thu, May 4, 2017	21.03	21.10	20.64	20.69
2952	NASDAQ	ATRC	Wed, May 3, 2017	21.10	21.19	20.77	21.02
2951	NASDAQ	ATRC	Tue, May 2, 2017	21.18	21.50	21.03	21.20
2950	NASDAQ	ATRC	Mon, May 1, 2017	20.62	21.24	20.53	21.11
2949	NASDAQ	ATRC	Fri, Apr 28, 2017	20.96	20.98	20.48	20.50
2948	NASDAQ	ATRC	Thu, Apr 27, 2017	20.95	21.13	20.88	20.90
2947	NASDAQ	ATRC	Wed, Apr 26, 2017	20.47	21.26	20.47	20.89
2946	NASDAQ	ATRC	Tue, Apr 25, 2017	20.32	20.72	20.03	20.50
2945	NASDAQ	ATRC	Mon, Apr 24, 2017	19.85	20.34	19.77	20.18
2944	NASDAQ	ATRC	Fri, Apr 21, 2017	19.69	19.75	19.47	19.55
2943	NASDAQ	ATRC	Thu, Apr 20, 2017	19.60	19.76	19.48	19.69
2942	NASDAQ	ATRC	Wed, Apr 19, 2017	19.58	19.82	19.48	19.53
2941	NASDAQ	ATRC	Tue, Apr 18, 2017	19.31	19.54	19.19	19.48
2940	NASDAQ	ATRC	Mon, Apr 17, 2017	19.27	19.64	19.22	19.41
2939	NASDAQ	ATRC	Thu, Apr 13, 2017	19.27	19.35	18.98	19.20
2938	NASDAQ	ATRC	Wed, Apr 12, 2017	19.26	19.40	19.07	19.31
2937	NASDAQ	ATRC	Tue, Apr 11, 2017	19.17	19.28	19.02	19.24
2936	NASDAQ	ATRC	Mon, Apr 10, 2017	19.23	19.59	18.76	19.17
2935	NASDAQ	ATRC	Fri, Apr 7, 2017	18.69	19.36	18.68	19.19
2934	NASDAQ	ATRC	Thu, Apr 6, 2017	18.53	18.76	18.33	18.76
2933	NASDAQ	ATRC	Wed, Apr 5, 2017	18.90	19.27	18.50	18.54
2932	NASDAQ	ATRC	Tue, Apr 4, 2017	19.27	19.45	18.76	18.82
2931	NASDAQ	ATRC	Mon, Apr 3, 2017	19.15	19.36	18.82	19.27
2930	NASDAQ	ATRC	Fri, Mar 31, 2017	18.87	19.38	18.86	19.15
2929	NASDAQ	ATRC	Thu, Mar 30, 2017	18.98	18.98	18.75	18.86
2928	NASDAQ	ATRC	Wed, Mar 29, 2017	18.73	19.14	18.73	18.91
2927	NASDAQ	ATRC	Tue, Mar 28, 2017	18.90	19.03	18.70	18.82
2926	NASDAQ	ATRC	Mon, Mar 27, 2017	18.68	19.15	18.62	19.07
2925	NASDAQ	ATRC	Fri, Mar 24, 2017	18.59	19.04	18.59	18.93
2924	NASDAQ	ATRC	Thu, Mar 23, 2017	18.32	19.04	18.02	18.57
2923	NASDAQ	ATRC	Wed, Mar 22, 2017	18.45	18.45	18.12	18.38
2922	NASDAQ	ATRC	Tue, Mar 21, 2017	19.12	19.50	18.48	18.48
2921	NASDAQ	ATRC	Mon, Mar 20, 2017	19.07	19.27	18.87	18.97
2920	NASDAQ	ATRC	Fri, Mar 17, 2017	18.71	19.00	18.64	18.96
2919	NASDAQ	ATRC	Thu, Mar 16, 2017	18.96	19.02	18.68	18.87
2918	NASDAQ	ATRC	Wed, Mar 15, 2017	18.35	19.00	18.35	18.91
2917	NASDAQ	ATRC	Tue, Mar 14, 2017	17.96	18.28	17.79	18.24
2916	NASDAQ	ATRC	Mon, Mar 13, 2017	18.28	18.44	18.07	18.17
2915	NASDAQ	ATRC	Fri, Mar 10, 2017	18.47	18.47	18.11	18.32
2914	NASDAQ	ATRC	Thu, Mar 9, 2017	17.75	18.34	17.75	18.27
2913	NASDAQ	ATRC	Wed, Mar 8, 2017	17.84	18.02	17.72	17.77
2912	NASDAQ	ATRC	Tue, Mar 7, 2017	17.71	17.96	17.49	17.91
2911	NASDAQ	ATRC	Mon, Mar 6, 2017	18.30	18.62	16.92	17.82
2910	NASDAQ	ATRC	Fri, Mar 3, 2017	19.00	19.21	18.70	18.96
2909	NASDAQ	ATRC	Thu, Mar 2, 2017	18.88	19.59	18.52	19.18
2908	NASDAQ	ATRC	Wed, Mar 1, 2017	18.03	19.07	17.62	18.95
2907	NASDAQ	ATRC	Tue, Feb 28, 2017	17.97	18.44	17.89	18.25
2906	NASDAQ	ATRC	Mon, Feb 27, 2017	17.60	18.27	17.57	18.06
2905	NASDAQ	ATRC	Fri, Feb 24, 2017	17.22	17.67	17.08	17.65
2904	NASDAQ	ATRC	Thu, Feb 23, 2017	17.20	17.45	17.10	17.35
2903	NASDAQ	ATRC	Wed, Feb 22, 2017	17.55	17.58	17.09	17.22
2902	NASDAQ	ATRC	Tue, Feb 21, 2017	17.43	17.85	17.43	17.57
2901	NASDAQ	ATRC	Fri, Feb 17, 2017	17.50	17.74	17.15	17.39
2900	NASDAQ	ATRC	Thu, Feb 16, 2017	17.49	17.52	17.16	17.49
2899	NASDAQ	ATRC	Wed, Feb 15, 2017	16.99	17.55	16.86	17.51
2898	NASDAQ	ATRC	Tue, Feb 14, 2017	16.78	17.18	16.78	17.10
2897	NASDAQ	ATRC	Mon, Feb 13, 2017	17.28	17.30	16.73	16.76
2896	NASDAQ	ATRC	Fri, Feb 10, 2017	17.18	17.18	16.96	17.15
2895	NASDAQ	ATRC	Thu, Feb 9, 2017	17.09	17.20	16.89	17.07
2894	NASDAQ	ATRC	Wed, Feb 8, 2017	16.99	17.17	16.84	17.08
2893	NASDAQ	ATRC	Tue, Feb 7, 2017	16.80	17.09	16.76	17.03
2892	NASDAQ	ATRC	Mon, Feb 6, 2017	16.47	16.81	16.34	16.78
2891	NASDAQ	ATRC	Fri, Feb 3, 2017	16.46	16.57	16.26	16.47
2890	NASDAQ	ATRC	Thu, Feb 2, 2017	16.08	16.37	15.98	16.36
2889	NASDAQ	ATRC	Wed, Feb 1, 2017	16.36	16.54	16.06	16.13
2888	NASDAQ	ATRC	Tue, Jan 31, 2017	15.94	16.34	15.83	16.27
2887	NASDAQ	ATRC	Mon, Jan 30, 2017	15.93	16.10	15.90	16.01
2886	NASDAQ	ATRC	Fri, Jan 27, 2017	16.20	16.21	15.77	16.01
2885	NASDAQ	ATRC	Thu, Jan 26, 2017	16.14	16.27	15.81	16.18
2884	NASDAQ	ATRC	Wed, Jan 25, 2017	15.75	16.56	15.75	16.19
2883	NASDAQ	ATRC	Tue, Jan 24, 2017	15.08	15.72	15.08	15.70
2882	NASDAQ	ATRC	Mon, Jan 23, 2017	15.05	15.20	14.78	14.94
2881	NASDAQ	ATRC	Fri, Jan 20, 2017	15.31	15.31	15.08	15.10
2880	NASDAQ	ATRC	Thu, Jan 19, 2017	15.21	15.40	15.01	15.24
2879	NASDAQ	ATRC	Wed, Jan 18, 2017	15.64	15.70	15.16	15.30
2878	NASDAQ	ATRC	Tue, Jan 17, 2017	15.97	16.23	15.41	15.54
2877	NASDAQ	ATRC	Fri, Jan 13, 2017	16.50	16.59	15.96	16.14
2876	NASDAQ	ATRC	Thu, Jan 12, 2017	16.80	16.80	16.19	16.40
2875	NASDAQ	ATRC	Wed, Jan 11, 2017	16.64	16.84	16.39	16.80
2874	NASDAQ	ATRC	Tue, Jan 10, 2017	16.72	16.87	16.37	16.64
2873	NASDAQ	ATRC	Mon, Jan 9, 2017	18.83	18.83	16.15	16.59
2872	NASDAQ	ATRC	Fri, Jan 6, 2017	18.99	19.09	18.74	18.93
2871	NASDAQ	ATRC	Thu, Jan 5, 2017	19.22	19.42	18.90	18.92
2870	NASDAQ	ATRC	Wed, Jan 4, 2017	19.30	19.47	19.02	19.19
2869	NASDAQ	ATRC	Tue, Jan 3, 2017	19.79	19.79	18.94	19.20
2868	NASDAQ	ATRC	Fri, Dec 30, 2016	19.68	19.73	19.41	19.57
2867	NASDAQ	ATRC	Thu, Dec 29, 2016	19.55	19.81	19.50	19.70
2866	NASDAQ	ATRC	Wed, Dec 28, 2016	19.58	19.58	19.32	19.47
2865	NASDAQ	ATRC	Tue, Dec 27, 2016	19.21	19.61	19.21	19.41
2864	NASDAQ	ATRC	Fri, Dec 23, 2016	18.65	19.25	18.65	19.23
2863	NASDAQ	ATRC	Thu, Dec 22, 2016	18.76	18.95	18.43	18.83
2862	NASDAQ	ATRC	Wed, Dec 21, 2016	18.60	18.85	18.03	18.80
2861	NASDAQ	ATRC	Tue, Dec 20, 2016	18.66	18.91	18.37	18.68
2860	NASDAQ	ATRC	Mon, Dec 19, 2016	18.52	19.00	18.28	18.55
2859	NASDAQ	ATRC	Fri, Dec 16, 2016	18.56	18.94	18.49	18.56
2858	NASDAQ	ATRC	Thu, Dec 15, 2016	18.42	18.85	18.32	18.49
2857	NASDAQ	ATRC	Wed, Dec 14, 2016	18.50	18.86	18.22	18.32
2856	NASDAQ	ATRC	Tue, Dec 13, 2016	18.86	19.22	18.48	18.50
2855	NASDAQ	ATRC	Mon, Dec 12, 2016	18.50	18.87	18.39	18.81
2854	NASDAQ	ATRC	Fri, Dec 9, 2016	18.34	18.99	17.97	18.55
2853	NASDAQ	ATRC	Thu, Dec 8, 2016	18.43	18.81	18.09	18.27
2852	NASDAQ	ATRC	Wed, Dec 7, 2016	18.46	18.94	18.27	18.44
2851	NASDAQ	ATRC	Tue, Dec 6, 2016	19.01	19.20	18.45	18.56
2850	NASDAQ	ATRC	Mon, Dec 5, 2016	18.97	19.25	18.72	18.98
2849	NASDAQ	ATRC	Fri, Dec 2, 2016	18.32	18.96	18.32	18.81
2848	NASDAQ	ATRC	Thu, Dec 1, 2016	17.95	18.35	17.76	18.32
2847	NASDAQ	ATRC	Wed, Nov 30, 2016	18.25	18.44	17.98	17.99
2846	NASDAQ	ATRC	Tue, Nov 29, 2016	18.92	18.96	18.26	18.29
2845	NASDAQ	ATRC	Mon, Nov 28, 2016	19.22	19.26	18.82	18.85
2844	NASDAQ	ATRC	Fri, Nov 25, 2016	19.36	19.47	19.07	19.36
2843	NASDAQ	ATRC	Wed, Nov 23, 2016	19.43	19.46	18.96	19.42
2842	NASDAQ	ATRC	Tue, Nov 22, 2016	19.61	19.71	19.19	19.38
2841	NASDAQ	ATRC	Mon, Nov 21, 2016	20.00	20.12	19.50	19.58
2840	NASDAQ	ATRC	Fri, Nov 18, 2016	19.40	20.10	19.40	19.99
2839	NASDAQ	ATRC	Thu, Nov 17, 2016	19.74	19.85	18.54	19.31
2838	NASDAQ	ATRC	Wed, Nov 16, 2016	20.01	20.22	19.64	19.65
2837	NASDAQ	ATRC	Tue, Nov 15, 2016	19.67	20.40	19.58	20.06
2836	NASDAQ	ATRC	Mon, Nov 14, 2016	20.23	20.35	19.44	19.65
2835	NASDAQ	ATRC	Fri, Nov 11, 2016	19.50	20.25	19.27	19.95
2834	NASDAQ	ATRC	Thu, Nov 10, 2016	18.39	19.44	18.18	19.40
2833	NASDAQ	ATRC	Wed, Nov 9, 2016	17.25	18.20	17.10	18.17
2832	NASDAQ	ATRC	Tue, Nov 8, 2016	17.40	17.62	17.18	17.52
2831	NASDAQ	ATRC	Mon, Nov 7, 2016	17.65	17.91	17.45	17.50
2830	NASDAQ	ATRC	Fri, Nov 4, 2016	16.82	17.29	16.74	17.25
2829	NASDAQ	ATRC	Thu, Nov 3, 2016	17.73	17.89	16.71	16.75
2828	NASDAQ	ATRC	Wed, Nov 2, 2016	17.81	18.39	17.53	17.64
2827	NASDAQ	ATRC	Tue, Nov 1, 2016	18.24	18.33	17.74	17.95
2826	NASDAQ	ATRC	Mon, Oct 31, 2016	17.60	18.33	17.43	18.24
2825	NASDAQ	ATRC	Fri, Oct 28, 2016	18.75	18.85	17.29	17.68
2824	NASDAQ	ATRC	Thu, Oct 27, 2016	16.45	16.69	15.15	15.20
2823	NASDAQ	ATRC	Wed, Oct 26, 2016	17.56	17.56	16.27	16.47
2822	NASDAQ	ATRC	Tue, Oct 25, 2016	17.80	17.90	17.21	17.54
2821	NASDAQ	ATRC	Mon, Oct 24, 2016	17.67	18.07	17.35	17.75
2820	NASDAQ	ATRC	Fri, Oct 21, 2016	17.38	17.52	17.15	17.48
2819	NASDAQ	ATRC	Thu, Oct 20, 2016	16.99	17.71	16.98	17.57
2818	NASDAQ	ATRC	Wed, Oct 19, 2016	16.98	17.10	16.70	17.00
2817	NASDAQ	ATRC	Tue, Oct 18, 2016	17.00	17.36	16.81	16.99
2816	NASDAQ	ATRC	Mon, Oct 17, 2016	16.60	16.86	16.43	16.83
2815	NASDAQ	ATRC	Fri, Oct 14, 2016	16.50	16.64	16.30	16.59
2814	NASDAQ	ATRC	Thu, Oct 13, 2016	16.37	16.57	16.08	16.50
2813	NASDAQ	ATRC	Wed, Oct 12, 2016	16.56	16.64	16.30	16.49
2812	NASDAQ	ATRC	Tue, Oct 11, 2016	17.40	17.40	16.48	16.49
2811	NASDAQ	ATRC	Mon, Oct 10, 2016	17.74	17.86	17.14	17.38
2810	NASDAQ	ATRC	Fri, Oct 7, 2016	16.22	17.69	15.55	17.52
2809	NASDAQ	ATRC	Thu, Oct 6, 2016	15.94	16.25	15.78	16.15
2808	NASDAQ	ATRC	Wed, Oct 5, 2016	15.85	16.17	15.85	15.97
2807	NASDAQ	ATRC	Tue, Oct 4, 2016	16.24	16.24	15.65	15.85
2806	NASDAQ	ATRC	Mon, Oct 3, 2016	15.67	15.72	15.43	15.61
2805	NASDAQ	ATRC	Fri, Sep 30, 2016	15.46	15.94	15.36	15.82
2804	NASDAQ	ATRC	Thu, Sep 29, 2016	15.81	15.81	15.35	15.36
2803	NASDAQ	ATRC	Wed, Sep 28, 2016	16.07	16.29	15.82	15.82
2802	NASDAQ	ATRC	Tue, Sep 27, 2016	15.94	16.14	15.79	16.05
2801	NASDAQ	ATRC	Mon, Sep 26, 2016	15.92	16.00	15.67	15.84
2800	NASDAQ	ATRC	Fri, Sep 23, 2016	16.49	16.50	16.13	16.14
2799	NASDAQ	ATRC	Thu, Sep 22, 2016	16.12	16.53	16.11	16.50
2798	NASDAQ	ATRC	Wed, Sep 21, 2016	16.02	16.10	15.68	15.96
2797	NASDAQ	ATRC	Tue, Sep 20, 2016	16.17	16.31	15.89	15.97
2796	NASDAQ	ATRC	Mon, Sep 19, 2016	16.30	16.36	15.91	16.15
2795	NASDAQ	ATRC	Fri, Sep 16, 2016	16.26	16.46	15.98	16.24
2794	NASDAQ	ATRC	Thu, Sep 15, 2016	15.66	16.24	15.59	16.24
2793	NASDAQ	ATRC	Wed, Sep 14, 2016	15.97	16.17	15.60	15.74
2792	NASDAQ	ATRC	Tue, Sep 13, 2016	16.39	16.69	15.75	15.96
2791	NASDAQ	ATRC	Mon, Sep 12, 2016	16.08	16.53	16.02	16.51
2790	NASDAQ	ATRC	Fri, Sep 9, 2016	17.04	17.16	16.12	16.13
2789	NASDAQ	ATRC	Thu, Sep 8, 2016	17.22	17.27	16.83	17.17
2788	NASDAQ	ATRC	Wed, Sep 7, 2016	16.94	17.25	16.80	17.19
2787	NASDAQ	ATRC	Tue, Sep 6, 2016	16.00	17.05	15.89	16.99
2786	NASDAQ	ATRC	Fri, Sep 2, 2016	15.52	15.99	15.52	15.89
2785	NASDAQ	ATRC	Thu, Sep 1, 2016	15.45	15.58	15.05	15.50
2784	NASDAQ	ATRC	Wed, Aug 31, 2016	15.40	15.56	15.10	15.39
2783	NASDAQ	ATRC	Tue, Aug 30, 2016	15.10	15.40	15.10	15.35
2782	NASDAQ	ATRC	Mon, Aug 29, 2016	14.81	15.20	14.52	15.05
2781	NASDAQ	ATRC	Fri, Aug 26, 2016	14.53	14.83	14.50	14.74
2780	NASDAQ	ATRC	Thu, Aug 25, 2016	14.73	14.83	14.49	14.58
2779	NASDAQ	ATRC	Wed, Aug 24, 2016	14.88	15.11	14.71	14.76
2778	NASDAQ	ATRC	Tue, Aug 23, 2016	14.77	15.05	14.72	14.88
2777	NASDAQ	ATRC	Mon, Aug 22, 2016	14.46	14.80	14.41	14.77
2776	NASDAQ	ATRC	Fri, Aug 19, 2016	14.50	15.38	14.36	14.54
2775	NASDAQ	ATRC	Thu, Aug 18, 2016	14.87	15.00	14.46	14.57
2774	NASDAQ	ATRC	Wed, Aug 17, 2016	15.72	15.72	14.84	14.90
2773	NASDAQ	ATRC	Tue, Aug 16, 2016	15.82	15.92	15.60	15.72
2772	NASDAQ	ATRC	Mon, Aug 15, 2016	15.49	15.97	15.49	15.87
2771	NASDAQ	ATRC	Fri, Aug 12, 2016	14.87	15.48	14.79	15.48
2770	NASDAQ	ATRC	Thu, Aug 11, 2016	14.55	14.92	14.37	14.89
2769	NASDAQ	ATRC	Wed, Aug 10, 2016	14.49	14.55	14.26	14.52
2768	NASDAQ	ATRC	Tue, Aug 9, 2016	14.01	14.63	13.98	14.52
2767	NASDAQ	ATRC	Mon, Aug 8, 2016	13.49	14.91	13.45	14.05
2766	NASDAQ	ATRC	Fri, Aug 5, 2016	15.25	15.25	13.50	13.54
2765	NASDAQ	ATRC	Thu, Aug 4, 2016	15.12	15.38	14.76	14.82
2764	NASDAQ	ATRC	Wed, Aug 3, 2016	14.95	15.19	14.56	15.16
2763	NASDAQ	ATRC	Tue, Aug 2, 2016	15.17	15.31	14.97	15.00
2762	NASDAQ	ATRC	Mon, Aug 1, 2016	15.25	15.55	15.09	15.22
2761	NASDAQ	ATRC	Fri, Jul 29, 2016	14.72	15.31	14.53	15.19
2760	NASDAQ	ATRC	Thu, Jul 28, 2016	14.90	15.09	14.64	14.72
2759	NASDAQ	ATRC	Wed, Jul 27, 2016	14.95	15.00	14.79	14.90
2758	NASDAQ	ATRC	Tue, Jul 26, 2016	14.95	15.11	14.90	14.95
2757	NASDAQ	ATRC	Mon, Jul 25, 2016	15.29	15.30	14.83	14.98
2756	NASDAQ	ATRC	Fri, Jul 22, 2016	15.28	15.32	15.00	15.31
2755	NASDAQ	ATRC	Thu, Jul 21, 2016	15.42	15.57	15.15	15.24
2754	NASDAQ	ATRC	Wed, Jul 20, 2016	15.09	15.55	15.09	15.46
2753	NASDAQ	ATRC	Tue, Jul 19, 2016	15.39	15.39	14.97	15.05
2752	NASDAQ	ATRC	Mon, Jul 18, 2016	15.54	15.65	15.33	15.38
2751	NASDAQ	ATRC	Fri, Jul 15, 2016	15.61	15.62	15.24	15.51
2750	NASDAQ	ATRC	Thu, Jul 14, 2016	15.42	15.54	15.00	15.52
2749	NASDAQ	ATRC	Wed, Jul 13, 2016	15.59	15.64	15.16	15.32
2748	NASDAQ	ATRC	Tue, Jul 12, 2016	15.26	15.72	15.26	15.48
2747	NASDAQ	ATRC	Mon, Jul 11, 2016	15.25	15.50	15.14	15.31
2746	NASDAQ	ATRC	Fri, Jul 8, 2016	15.10	15.30	14.73	15.20
2745	NASDAQ	ATRC	Thu, Jul 7, 2016	14.94	15.12	14.87	15.00
2744	NASDAQ	ATRC	Wed, Jul 6, 2016	14.39	15.02	14.39	14.95
2743	NASDAQ	ATRC	Tue, Jul 5, 2016	14.42	14.78	14.29	14.48
2742	NASDAQ	ATRC	Fri, Jul 1, 2016	14.10	14.52	13.97	14.44
2741	NASDAQ	ATRC	Thu, Jun 30, 2016	14.58	15.11	13.93	14.13
2740	NASDAQ	ATRC	Wed, Jun 29, 2016	14.52	14.58	14.22	14.39
2739	NASDAQ	ATRC	Tue, Jun 28, 2016	14.29	14.66	14.29	14.35
2738	NASDAQ	ATRC	Mon, Jun 27, 2016	14.37	14.93	13.90	14.11
2737	NASDAQ	ATRC	Fri, Jun 24, 2016	14.34	14.82	14.16	14.46
2736	NASDAQ	ATRC	Thu, Jun 23, 2016	14.89	15.16	14.58	15.12
2735	NASDAQ	ATRC	Wed, Jun 22, 2016	14.80	15.07	14.50	14.67
2734	NASDAQ	ATRC	Tue, Jun 21, 2016	15.24	15.48	14.66	14.81
2733	NASDAQ	ATRC	Mon, Jun 20, 2016	14.92	15.20	14.68	15.11
2732	NASDAQ	ATRC	Fri, Jun 17, 2016	15.54	15.56	14.68	14.79
2731	NASDAQ	ATRC	Thu, Jun 16, 2016	15.10	15.70	14.95	15.58
2730	NASDAQ	ATRC	Wed, Jun 15, 2016	15.08	15.41	14.88	15.20
2729	NASDAQ	ATRC	Tue, Jun 14, 2016	15.40	15.79	14.87	14.99
2728	NASDAQ	ATRC	Mon, Jun 13, 2016	15.39	16.03	15.26	15.44
2727	NASDAQ	ATRC	Fri, Jun 10, 2016	15.79	15.82	15.42	15.47
2726	NASDAQ	ATRC	Thu, Jun 9, 2016	15.85	16.25	15.71	15.91
2725	NASDAQ	ATRC	Wed, Jun 8, 2016	15.73	15.97	15.55	15.91
2724	NASDAQ	ATRC	Tue, Jun 7, 2016	14.97	15.78	14.97	15.73
2723	NASDAQ	ATRC	Mon, Jun 6, 2016	14.93	15.08	14.81	14.97
2722	NASDAQ	ATRC	Fri, Jun 3, 2016	15.13	15.43	14.87	14.91
2721	NASDAQ	ATRC	Thu, Jun 2, 2016	14.60	15.62	14.60	15.30
2720	NASDAQ	ATRC	Wed, Jun 1, 2016	14.49	14.66	14.37	14.62
2719	NASDAQ	ATRC	Tue, May 31, 2016	14.96	15.05	14.43	14.49
2718	NASDAQ	ATRC	Fri, May 27, 2016	14.68	15.53	14.64	14.91
2717	NASDAQ	ATRC	Thu, May 26, 2016	14.90	15.01	14.54	14.64
2716	NASDAQ	ATRC	Wed, May 25, 2016	14.95	15.15	13.57	14.99
2715	NASDAQ	ATRC	Tue, May 24, 2016	14.34	14.95	14.15	14.92
2714	NASDAQ	ATRC	Mon, May 23, 2016	14.14	14.39	14.07	14.30
2713	NASDAQ	ATRC	Fri, May 20, 2016	14.05	14.19	13.89	14.15
2712	NASDAQ	ATRC	Thu, May 19, 2016	13.87	14.11	13.61	14.02
2711	NASDAQ	ATRC	Wed, May 18, 2016	13.66	13.93	13.52	13.80
2710	NASDAQ	ATRC	Tue, May 17, 2016	13.70	14.11	13.50	13.74
2709	NASDAQ	ATRC	Mon, May 16, 2016	13.55	13.90	13.49	13.70
2708	NASDAQ	ATRC	Fri, May 13, 2016	13.73	13.89	13.52	13.57
2707	NASDAQ	ATRC	Thu, May 12, 2016	14.20	14.28	13.44	13.78
2706	NASDAQ	ATRC	Wed, May 11, 2016	14.10	14.60	14.04	14.19
2705	NASDAQ	ATRC	Tue, May 10, 2016	14.42	14.42	13.97	14.15
2704	NASDAQ	ATRC	Mon, May 9, 2016	14.08	14.30	13.82	14.25
2703	NASDAQ	ATRC	Fri, May 6, 2016	14.31	14.45	13.65	13.96
2702	NASDAQ	ATRC	Thu, May 5, 2016	14.38	15.05	14.23	14.42
2701	NASDAQ	ATRC	Wed, May 4, 2016	14.50	14.65	14.23	14.38
2700	NASDAQ	ATRC	Tue, May 3, 2016	14.57	14.97	14.50	14.51
2699	NASDAQ	ATRC	Mon, May 2, 2016	15.96	16.16	14.59	14.90
2698	NASDAQ	ATRC	Fri, Apr 29, 2016	17.95	17.95	15.28	15.90
2697	NASDAQ	ATRC	Thu, Apr 28, 2016	17.74	18.03	16.98	17.01
2696	NASDAQ	ATRC	Wed, Apr 27, 2016	17.47	17.90	17.26	17.75
2695	NASDAQ	ATRC	Tue, Apr 26, 2016	16.98	17.60	16.74	17.49
2694	NASDAQ	ATRC	Mon, Apr 25, 2016	16.52	16.97	16.40	16.94
2693	NASDAQ	ATRC	Fri, Apr 22, 2016	16.74	16.88	16.57	16.60
2692	NASDAQ	ATRC	Thu, Apr 21, 2016	16.44	16.78	16.33	16.69
2691	NASDAQ	ATRC	Wed, Apr 20, 2016	16.38	16.52	16.28	16.35
2690	NASDAQ	ATRC	Tue, Apr 19, 2016	16.58	16.58	15.92	16.27
2689	NASDAQ	ATRC	Mon, Apr 18, 2016	16.17	16.55	16.09	16.47
2688	NASDAQ	ATRC	Fri, Apr 15, 2016	16.08	16.35	15.99	16.20
2687	NASDAQ	ATRC	Thu, Apr 14, 2016	16.06	16.33	15.84	16.17
2686	NASDAQ	ATRC	Wed, Apr 13, 2016	15.79	16.18	15.79	16.02
2685	NASDAQ	ATRC	Tue, Apr 12, 2016	15.53	16.12	15.45	15.67
2684	NASDAQ	ATRC	Mon, Apr 11, 2016	15.80	16.05	15.49	15.56
2683	NASDAQ	ATRC	Fri, Apr 8, 2016	15.96	16.09	15.27	15.79
2682	NASDAQ	ATRC	Thu, Apr 7, 2016	16.05	16.11	15.67	15.85
2681	NASDAQ	ATRC	Wed, Apr 6, 2016	16.50	16.53	16.10	16.22
2680	NASDAQ	ATRC	Tue, Apr 5, 2016	17.50	17.50	17.50	16.51
2679	NASDAQ	ATRC	Mon, Apr 4, 2016	16.84	17.86	16.50	17.50
2678	NASDAQ	ATRC	Fri, Apr 1, 2016	16.78	17.09	16.50	16.78
2677	NASDAQ	ATRC	Thu, Mar 31, 2016	17.00	17.19	16.69	16.94
2676	NASDAQ	ATRC	Wed, Mar 30, 2016	17.08	17.41	16.54	16.94
2675	NASDAQ	ATRC	Tue, Mar 29, 2016	16.44	17.34	16.25	16.53
2674	NASDAQ	ATRC	Mon, Mar 28, 2016	16.06	16.43	15.80	16.21
2673	NASDAQ	ATRC	Thu, Mar 24, 2016	16.49	16.49	16.49	16.02
2672	NASDAQ	ATRC	Wed, Mar 23, 2016	17.20	17.23	16.47	16.49
2671	NASDAQ	ATRC	Tue, Mar 22, 2016	16.96	17.19	16.79	17.18
2670	NASDAQ	ATRC	Mon, Mar 21, 2016	17.12	17.38	16.95	16.99
2669	NASDAQ	ATRC	Fri, Mar 18, 2016	17.03	17.31	16.85	17.15
2668	NASDAQ	ATRC	Thu, Mar 17, 2016	17.27	17.85	16.48	16.93
2667	NASDAQ	ATRC	Wed, Mar 16, 2016	17.37	17.52	16.81	17.37
2666	NASDAQ	ATRC	Tue, Mar 15, 2016	18.32	18.32	18.32	17.42
2665	NASDAQ	ATRC	Mon, Mar 14, 2016	18.73	19.15	18.09	18.32
2664	NASDAQ	ATRC	Fri, Mar 11, 2016	18.06	18.92	17.53	18.87
2663	NASDAQ	ATRC	Thu, Mar 10, 2016	17.47	17.90	16.91	17.40
2662	NASDAQ	ATRC	Wed, Mar 9, 2016	16.85	16.85	16.85	17.40
2661	NASDAQ	ATRC	Tue, Mar 8, 2016	17.40	17.70	16.73	17.50
2660	NASDAQ	ATRC	Mon, Mar 7, 2016	16.67	17.69	16.67	17.50
2659	NASDAQ	ATRC	Fri, Mar 4, 2016	15.90	15.90	15.90	16.75
2658	NASDAQ	ATRC	Thu, Mar 3, 2016	15.29	15.29	15.29	15.90
2657	NASDAQ	ATRC	Wed, Mar 2, 2016	16.30	16.30	14.85	16.30
2656	NASDAQ	ATRC	Tue, Mar 1, 2016	16.57	16.57	16.57	16.30
2655	NASDAQ	ATRC	Mon, Feb 29, 2016	17.07	17.47	16.34	16.57
2654	NASDAQ	ATRC	Fri, Feb 26, 2016	16.59	17.21	16.19	17.00
2653	NASDAQ	ATRC	Thu, Feb 25, 2016	16.50	17.50	16.39	16.50
2652	NASDAQ	ATRC	Wed, Feb 24, 2016	16.70	16.79	16.00	16.39
2651	NASDAQ	ATRC	Tue, Feb 23, 2016	17.14	17.40	16.59	16.80
2650	NASDAQ	ATRC	Mon, Feb 22, 2016	17.32	17.70	16.96	17.34
2649	NASDAQ	ATRC	Fri, Feb 19, 2016	17.19	17.80	16.80	17.15
2648	NASDAQ	ATRC	Thu, Feb 18, 2016	17.89	17.89	17.07	17.22
2647	NASDAQ	ATRC	Wed, Feb 17, 2016	17.41	18.08	17.26	17.95
2646	NASDAQ	ATRC	Tue, Feb 16, 2016	16.69	17.33	16.50	17.27
2645	NASDAQ	ATRC	Fri, Feb 12, 2016	16.53	16.91	15.94	16.53
2644	NASDAQ	ATRC	Thu, Feb 11, 2016	16.27	16.55	16.01	16.34
2643	NASDAQ	ATRC	Wed, Feb 10, 2016	16.49	17.15	16.40	16.55
2642	NASDAQ	ATRC	Tue, Feb 9, 2016	16.20	17.05	16.13	16.43
2641	NASDAQ	ATRC	Mon, Feb 8, 2016	16.77	16.77	15.86	16.48
2640	NASDAQ	ATRC	Fri, Feb 5, 2016	17.66	17.82	16.81	16.94
2639	NASDAQ	ATRC	Thu, Feb 4, 2016	17.53	17.85	17.23	17.77
2638	NASDAQ	ATRC	Wed, Feb 3, 2016	17.79	17.90	17.11	17.60
2637	NASDAQ	ATRC	Tue, Feb 2, 2016	17.28	17.79	17.04	17.71
2636	NASDAQ	ATRC	Mon, Feb 1, 2016	17.38	17.95	17.36	17.47
2635	NASDAQ	ATRC	Fri, Jan 29, 2016	16.75	17.55	16.70	17.48
2634	NASDAQ	ATRC	Thu, Jan 28, 2016	18.05	18.06	16.45	16.68
2633	NASDAQ	ATRC	Wed, Jan 27, 2016	18.05	18.52	17.75	17.95
2632	NASDAQ	ATRC	Tue, Jan 26, 2016	18.46	18.52	17.70	18.04
2631	NASDAQ	ATRC	Mon, Jan 25, 2016	18.70	19.18	18.36	18.43
2630	NASDAQ	ATRC	Fri, Jan 22, 2016	18.84	19.03	18.50	18.75
2629	NASDAQ	ATRC	Thu, Jan 21, 2016	18.99	19.08	18.36	18.62
2628	NASDAQ	ATRC	Wed, Jan 20, 2016	18.31	19.49	17.88	18.99
2627	NASDAQ	ATRC	Tue, Jan 19, 2016	18.50	18.93	17.88	18.58
2626	NASDAQ	ATRC	Fri, Jan 15, 2016	18.31	18.71	17.46	18.25
2625	NASDAQ	ATRC	Thu, Jan 14, 2016	18.49	19.41	18.32	18.75
2624	NASDAQ	ATRC	Wed, Jan 13, 2016	18.80	19.11	17.96	18.37
2623	NASDAQ	ATRC	Tue, Jan 12, 2016	18.63	19.21	18.28	18.74
2622	NASDAQ	ATRC	Mon, Jan 11, 2016	19.44	19.49	18.18	18.51
2621	NASDAQ	ATRC	Fri, Jan 8, 2016	20.45	20.81	19.34	19.41
2620	NASDAQ	ATRC	Thu, Jan 7, 2016	20.72	20.78	20.27	20.32
2619	NASDAQ	ATRC	Wed, Jan 6, 2016	21.14	21.47	20.80	21.14
2618	NASDAQ	ATRC	Tue, Jan 5, 2016	21.24	21.68	21.08	21.47
2617	NASDAQ	ATRC	Mon, Jan 4, 2016	22.06	22.42	21.09	21.16
2616	NASDAQ	ATRC	Thu, Dec 31, 2015	22.50	22.75	22.09	22.44
2615	NASDAQ	ATRC	Wed, Dec 30, 2015	22.67	22.96	22.56	22.58
2614	NASDAQ	ATRC	Tue, Dec 29, 2015	22.69	22.90	22.55	22.66
2613	NASDAQ	ATRC	Mon, Dec 28, 2015	22.42	22.68	21.89	22.53
2612	NASDAQ	ATRC	Thu, Dec 24, 2015	22.58	22.91	22.39	22.57
2611	NASDAQ	ATRC	Wed, Dec 23, 2015	22.38	22.91	22.18	22.55
2610	NASDAQ	ATRC	Tue, Dec 22, 2015	21.92	22.32	21.41	22.28
2609	NASDAQ	ATRC	Mon, Dec 21, 2015	22.57	22.57	21.65	21.85
2608	NASDAQ	ATRC	Fri, Dec 18, 2015	22.06	23.24	20.72	22.43
2607	NASDAQ	ATRC	Thu, Dec 17, 2015	21.80	22.61	21.56	22.17
2606	NASDAQ	ATRC	Wed, Dec 16, 2015	21.47	21.82	21.23	21.67
2605	NASDAQ	ATRC	Tue, Dec 15, 2015	20.89	21.35	20.84	21.35
2604	NASDAQ	ATRC	Mon, Dec 14, 2015	20.89	21.13	20.43	20.72
2603	NASDAQ	ATRC	Fri, Dec 11, 2015	21.39	21.65	20.69	20.85
2602	NASDAQ	ATRC	Thu, Dec 10, 2015	21.90	22.20	21.61	21.82
2601	NASDAQ	ATRC	Wed, Dec 9, 2015	19.99	22.08	19.99	21.97
2600	NASDAQ	ATRC	Tue, Dec 8, 2015	21.90	22.37	21.62	22.29
2599	NASDAQ	ATRC	Mon, Dec 7, 2015	21.53	22.16	21.43	22.06
2598	NASDAQ	ATRC	Fri, Dec 4, 2015	21.53	21.56	21.17	21.51
2597	NASDAQ	ATRC	Thu, Dec 3, 2015	22.27	22.37	21.25	21.48
2596	NASDAQ	ATRC	Wed, Dec 2, 2015	22.04	22.24	21.63	22.15
2595	NASDAQ	ATRC	Tue, Dec 1, 2015	21.60	22.07	21.28	22.00
2594	NASDAQ	ATRC	Mon, Nov 30, 2015	22.50	22.50	21.39	21.48
2593	NASDAQ	ATRC	Fri, Nov 27, 2015	22.27	22.68	21.99	22.41
2592	NASDAQ	ATRC	Wed, Nov 25, 2015	21.39	22.28	21.31	22.24
2591	NASDAQ	ATRC	Tue, Nov 24, 2015	20.93	21.67	20.83	21.65
2590	NASDAQ	ATRC	Mon, Nov 23, 2015	20.77	21.62	20.53	20.98
2589	NASDAQ	ATRC	Fri, Nov 20, 2015	20.59	20.95	20.42	20.83
2588	NASDAQ	ATRC	Thu, Nov 19, 2015	20.84	20.84	20.17	20.46
2587	NASDAQ	ATRC	Wed, Nov 18, 2015	20.71	20.96	20.38	20.88
2586	NASDAQ	ATRC	Tue, Nov 17, 2015	20.06	21.03	19.91	20.70
2585	NASDAQ	ATRC	Mon, Nov 16, 2015	20.00	20.23	19.60	19.97
2584	NASDAQ	ATRC	Fri, Nov 13, 2015	19.82	20.29	19.67	20.07
2583	NASDAQ	ATRC	Thu, Nov 12, 2015	20.57	20.59	19.89	19.95
2582	NASDAQ	ATRC	Wed, Nov 11, 2015	20.89	21.08	20.57	20.70
2581	NASDAQ	ATRC	Tue, Nov 10, 2015	21.07	21.34	20.81	20.86
2580	NASDAQ	ATRC	Mon, Nov 9, 2015	20.74	21.22	20.66	21.09
2579	NASDAQ	ATRC	Fri, Nov 6, 2015	20.70	21.19	20.42	20.83
2578	NASDAQ	ATRC	Thu, Nov 5, 2015	20.44	20.88	19.81	20.86
2577	NASDAQ	ATRC	Wed, Nov 4, 2015	20.07	20.60	19.89	20.48
2576	NASDAQ	ATRC	Tue, Nov 3, 2015	19.35	20.58	18.75	20.04
2575	NASDAQ	ATRC	Mon, Nov 2, 2015	18.61	19.50	18.50	19.45
2574	NASDAQ	ATRC	Fri, Oct 30, 2015	18.46	18.83	18.30	18.53
2573	NASDAQ	ATRC	Thu, Oct 29, 2015	18.80	19.37	18.39	18.50
2572	NASDAQ	ATRC	Wed, Oct 28, 2015	19.60	19.66	18.18	18.78
2571	NASDAQ	ATRC	Tue, Oct 27, 2015	18.82	19.56	18.82	19.39
2570	NASDAQ	ATRC	Mon, Oct 26, 2015	19.02	19.41	18.52	18.91
2569	NASDAQ	ATRC	Fri, Oct 23, 2015	18.51	19.31	18.30	18.98
2568	NASDAQ	ATRC	Thu, Oct 22, 2015	18.45	18.64	17.54	18.29
2567	NASDAQ	ATRC	Wed, Oct 21, 2015	18.64	18.80	18.13	18.39
2566	NASDAQ	ATRC	Tue, Oct 20, 2015	19.21	19.21	18.45	18.64
2565	NASDAQ	ATRC	Mon, Oct 19, 2015	19.12	19.45	18.85	19.21
2564	NASDAQ	ATRC	Fri, Oct 16, 2015	18.70	19.49	18.70	19.23
2563	NASDAQ	ATRC	Thu, Oct 15, 2015	17.71	18.73	17.71	18.63
2562	NASDAQ	ATRC	Wed, Oct 14, 2015	18.41	18.66	17.46	17.69
2561	NASDAQ	ATRC	Tue, Oct 13, 2015	19.37	19.37	18.32	18.38
2560	NASDAQ	ATRC	Mon, Oct 12, 2015	18.28	19.79	18.28	19.53
2559	NASDAQ	ATRC	Fri, Oct 9, 2015	18.20	18.39	17.87	18.32
2558	NASDAQ	ATRC	Thu, Oct 8, 2015	18.36	18.39	17.80	18.21
2557	NASDAQ	ATRC	Wed, Oct 7, 2015	18.26	18.57	17.71	18.41
2556	NASDAQ	ATRC	Tue, Oct 6, 2015	20.25	20.55	18.19	18.26
2555	NASDAQ	ATRC	Mon, Oct 5, 2015	22.45	22.87	19.41	20.47
2554	NASDAQ	ATRC	Fri, Oct 2, 2015	21.51	22.57	21.47	22.45
2553	NASDAQ	ATRC	Thu, Oct 1, 2015	21.86	21.94	20.84	21.86
2552	NASDAQ	ATRC	Wed, Sep 30, 2015	20.90	22.15	20.74	21.91
2551	NASDAQ	ATRC	Tue, Sep 29, 2015	19.97	20.85	19.90	20.65
2550	NASDAQ	ATRC	Mon, Sep 28, 2015	19.14	20.29	19.14	19.93
2549	NASDAQ	ATRC	Fri, Sep 25, 2015	23.14	23.14	20.09	20.09
2548	NASDAQ	ATRC	Thu, Sep 24, 2015	23.15	23.32	22.60	22.86
2547	NASDAQ	ATRC	Wed, Sep 23, 2015	21.77	24.14	21.77	23.39
2546	NASDAQ	ATRC	Tue, Sep 22, 2015	25.21	25.21	23.19	23.38
2545	NASDAQ	ATRC	Mon, Sep 21, 2015	26.67	26.88	25.28	26.02
2544	NASDAQ	ATRC	Fri, Sep 18, 2015	25.71	26.67	25.57	26.61
2543	NASDAQ	ATRC	Thu, Sep 17, 2015	25.48	26.39	25.41	26.07
2542	NASDAQ	ATRC	Wed, Sep 16, 2015	25.43	25.75	24.68	25.49
2541	NASDAQ	ATRC	Tue, Sep 15, 2015	25.00	25.75	24.89	25.44
2540	NASDAQ	ATRC	Mon, Sep 14, 2015	24.83	25.23	24.62	24.95
2539	NASDAQ	ATRC	Fri, Sep 11, 2015	24.67	25.20	24.67	24.79
2538	NASDAQ	ATRC	Thu, Sep 10, 2015	24.53	25.13	24.42	24.74
2537	NASDAQ	ATRC	Wed, Sep 9, 2015	24.61	24.84	24.24	24.56
2536	NASDAQ	ATRC	Tue, Sep 8, 2015	23.74	24.60	23.50	24.34
2535	NASDAQ	ATRC	Fri, Sep 4, 2015	23.73	24.09	23.10	23.42
2534	NASDAQ	ATRC	Thu, Sep 3, 2015	24.81	24.95	24.00	24.07
2533	NASDAQ	ATRC	Wed, Sep 2, 2015	24.30	24.88	23.93	24.75
2532	NASDAQ	ATRC	Tue, Sep 1, 2015	24.07	24.49	23.66	23.97
2531	NASDAQ	ATRC	Mon, Aug 31, 2015	25.38	25.59	24.16	24.46
2530	NASDAQ	ATRC	Fri, Aug 28, 2015	26.08	26.13	24.97	25.50
2529	NASDAQ	ATRC	Thu, Aug 27, 2015	25.56	26.43	24.70	26.27
2528	NASDAQ	ATRC	Wed, Aug 26, 2015	25.44	25.59	24.72	25.50
2527	NASDAQ	ATRC	Tue, Aug 25, 2015	25.27	25.27	24.57	24.86
2526	NASDAQ	ATRC	Mon, Aug 24, 2015	24.65	25.32	23.60	24.47
2525	NASDAQ	ATRC	Fri, Aug 21, 2015	25.97	26.55	25.56	25.67
2524	NASDAQ	ATRC	Thu, Aug 20, 2015	26.97	27.30	26.30	26.55
2523	NASDAQ	ATRC	Wed, Aug 19, 2015	27.26	27.52	26.84	27.31
2522	NASDAQ	ATRC	Tue, Aug 18, 2015	27.46	27.59	26.96	27.44
2521	NASDAQ	ATRC	Mon, Aug 17, 2015	26.41	27.74	26.27	27.54
2520	NASDAQ	ATRC	Fri, Aug 14, 2015	27.57	27.80	26.36	26.46
2519	NASDAQ	ATRC	Thu, Aug 13, 2015	27.58	28.10	27.13	27.67
2518	NASDAQ	ATRC	Wed, Aug 12, 2015	27.10	27.70	26.94	27.48
2517	NASDAQ	ATRC	Tue, Aug 11, 2015	26.96	27.69	26.65	27.23
2516	NASDAQ	ATRC	Mon, Aug 10, 2015	27.08	27.52	26.79	27.28
2515	NASDAQ	ATRC	Fri, Aug 7, 2015	26.78	27.41	26.55	26.95
2514	NASDAQ	ATRC	Thu, Aug 6, 2015	26.97	27.07	26.17	26.74
2513	NASDAQ	ATRC	Wed, Aug 5, 2015	27.81	27.99	26.85	26.92
2512	NASDAQ	ATRC	Tue, Aug 4, 2015	27.88	28.15	27.28	27.71
2511	NASDAQ	ATRC	Mon, Aug 3, 2015	27.72	28.11	27.70	27.93
2510	NASDAQ	ATRC	Fri, Jul 31, 2015	26.60	28.10	26.60	27.79
2509	NASDAQ	ATRC	Thu, Jul 30, 2015	26.49	27.33	26.49	26.59
2508	NASDAQ	ATRC	Wed, Jul 29, 2015	24.98	27.91	24.40	26.68
2507	NASDAQ	ATRC	Tue, Jul 28, 2015	23.47	23.61	22.75	23.24
2506	NASDAQ	ATRC	Mon, Jul 27, 2015	23.27	23.41	22.64	23.30
2505	NASDAQ	ATRC	Fri, Jul 24, 2015	24.40	24.40	23.25	23.42
2504	NASDAQ	ATRC	Thu, Jul 23, 2015	24.86	25.30	24.39	24.51
2503	NASDAQ	ATRC	Wed, Jul 22, 2015	24.32	25.00	24.32	24.94
2502	NASDAQ	ATRC	Tue, Jul 21, 2015	24.48	24.65	24.30	24.44
2501	NASDAQ	ATRC	Mon, Jul 20, 2015	24.79	24.91	24.28	24.55
2500	NASDAQ	ATRC	Fri, Jul 17, 2015	24.70	24.87	24.53	24.71
2499	NASDAQ	ATRC	Thu, Jul 16, 2015	24.49	24.94	24.38	24.70
2498	NASDAQ	ATRC	Wed, Jul 15, 2015	24.68	24.76	24.17	24.32
2497	NASDAQ	ATRC	Tue, Jul 14, 2015	24.97	25.06	24.45	24.64
2496	NASDAQ	ATRC	Mon, Jul 13, 2015	24.41	25.00	24.41	24.97
2495	NASDAQ	ATRC	Fri, Jul 10, 2015	23.62	24.44	23.41	24.31
2494	NASDAQ	ATRC	Thu, Jul 9, 2015	23.73	24.13	23.41	23.42
2493	NASDAQ	ATRC	Wed, Jul 8, 2015	23.85	24.50	23.38	23.47
2492	NASDAQ	ATRC	Tue, Jul 7, 2015	24.03	24.22	23.33	24.17
2491	NASDAQ	ATRC	Mon, Jul 6, 2015	23.71	24.20	23.54	24.05
2490	NASDAQ	ATRC	Thu, Jul 2, 2015	24.08	24.16	23.40	23.76
2489	NASDAQ	ATRC	Wed, Jul 1, 2015	24.83	24.83	23.98	24.02
2488	NASDAQ	ATRC	Tue, Jun 30, 2015	24.37	24.68	24.14	24.64
2487	NASDAQ	ATRC	Mon, Jun 29, 2015	24.44	24.75	24.08	24.09
2486	NASDAQ	ATRC	Fri, Jun 26, 2015	25.09	25.09	24.09	24.57
2485	NASDAQ	ATRC	Thu, Jun 25, 2015	24.22	25.36	24.00	25.02
2484	NASDAQ	ATRC	Wed, Jun 24, 2015	24.40	24.75	24.00	24.07
2483	NASDAQ	ATRC	Tue, Jun 23, 2015	24.03	24.50	23.71	24.40
2482	NASDAQ	ATRC	Mon, Jun 22, 2015	24.70	25.13	24.01	24.09
2481	NASDAQ	ATRC	Fri, Jun 19, 2015	23.93	24.71	23.91	24.57
2480	NASDAQ	ATRC	Thu, Jun 18, 2015	23.44	24.38	23.34	23.97
2479	NASDAQ	ATRC	Wed, Jun 17, 2015	23.14	23.94	23.14	23.39
2478	NASDAQ	ATRC	Tue, Jun 16, 2015	22.33	23.09	22.19	23.06
2477	NASDAQ	ATRC	Mon, Jun 15, 2015	22.51	22.53	22.05	22.44
2476	NASDAQ	ATRC	Fri, Jun 12, 2015	22.70	22.95	22.14	22.66
2475	NASDAQ	ATRC	Thu, Jun 11, 2015	22.86	23.21	22.56	22.71
2474	NASDAQ	ATRC	Wed, Jun 10, 2015	22.52	23.60	22.39	22.85
2473	NASDAQ	ATRC	Tue, Jun 9, 2015	22.67	22.68	22.09	22.43
2472	NASDAQ	ATRC	Mon, Jun 8, 2015	22.55	22.79	22.29	22.64
2471	NASDAQ	ATRC	Fri, Jun 5, 2015	22.28	22.55	21.74	22.51
2470	NASDAQ	ATRC	Thu, Jun 4, 2015	22.86	22.97	22.25	22.27
2469	NASDAQ	ATRC	Wed, Jun 3, 2015	23.07	23.15	22.80	22.97
2468	NASDAQ	ATRC	Tue, Jun 2, 2015	23.10	23.30	22.83	23.06
2467	NASDAQ	ATRC	Mon, Jun 1, 2015	22.84	23.46	22.40	23.24
2466	NASDAQ	ATRC	Fri, May 29, 2015	22.55	23.03	22.18	22.94
2465	NASDAQ	ATRC	Thu, May 28, 2015	22.20	22.65	22.08	22.59
2464	NASDAQ	ATRC	Wed, May 27, 2015	21.81	22.43	21.70	22.38
2463	NASDAQ	ATRC	Tue, May 26, 2015	22.09	22.18	21.50	21.81
2462	NASDAQ	ATRC	Fri, May 22, 2015	22.30	22.71	21.87	22.12
2461	NASDAQ	ATRC	Thu, May 21, 2015	22.47	22.73	22.11	22.30
2460	NASDAQ	ATRC	Wed, May 20, 2015	22.47	22.76	22.20	22.62
2459	NASDAQ	ATRC	Tue, May 19, 2015	21.84	22.53	21.54	22.49
2458	NASDAQ	ATRC	Mon, May 18, 2015	21.47	22.01	21.46	21.90
2457	NASDAQ	ATRC	Fri, May 15, 2015	21.72	21.95	21.40	21.46
2456	NASDAQ	ATRC	Thu, May 14, 2015	21.18	22.01	21.09	21.89
2455	NASDAQ	ATRC	Wed, May 13, 2015	21.76	22.01	20.98	21.13
2454	NASDAQ	ATRC	Tue, May 12, 2015	21.89	22.09	21.29	21.76
2453	NASDAQ	ATRC	Mon, May 11, 2015	21.90	22.17	21.70	21.78
2452	NASDAQ	ATRC	Fri, May 8, 2015	22.24	22.39	21.82	21.86
2451	NASDAQ	ATRC	Thu, May 7, 2015	22.08	22.46	21.82	21.93
2450	NASDAQ	ATRC	Wed, May 6, 2015	22.97	22.97	21.99	22.21
2449	NASDAQ	ATRC	Tue, May 5, 2015	22.69	22.97	22.39	22.92
2448	NASDAQ	ATRC	Mon, May 4, 2015	22.30	22.98	22.30	22.85
2447	NASDAQ	ATRC	Fri, May 1, 2015	22.28	22.37	21.61	22.25
2446	NASDAQ	ATRC	Thu, Apr 30, 2015	21.34	22.98	20.78	22.01
2445	NASDAQ	ATRC	Wed, Apr 29, 2015	20.55	20.68	19.90	19.96
2444	NASDAQ	ATRC	Tue, Apr 28, 2015	20.52	20.72	20.08	20.46
2443	NASDAQ	ATRC	Mon, Apr 27, 2015	21.47	21.47	20.32	20.44
2442	NASDAQ	ATRC	Fri, Apr 24, 2015	21.38	21.55	21.36	21.42
2441	NASDAQ	ATRC	Thu, Apr 23, 2015	21.31	21.58	21.17	21.48
2440	NASDAQ	ATRC	Wed, Apr 22, 2015	21.60	21.67	20.92	21.31
2439	NASDAQ	ATRC	Tue, Apr 21, 2015	21.68	21.82	21.46	21.67
2438	NASDAQ	ATRC	Mon, Apr 20, 2015	21.62	21.96	21.49	21.56
2437	NASDAQ	ATRC	Fri, Apr 17, 2015	21.22	21.54	20.81	21.46
2436	NASDAQ	ATRC	Thu, Apr 16, 2015	21.60	21.83	21.30	21.41
2435	NASDAQ	ATRC	Wed, Apr 15, 2015	21.48	21.88	21.33	21.62
2434	NASDAQ	ATRC	Tue, Apr 14, 2015	21.58	21.66	21.18	21.42
2433	NASDAQ	ATRC	Mon, Apr 13, 2015	21.65	21.76	21.24	21.57
2432	NASDAQ	ATRC	Fri, Apr 10, 2015	21.84	21.84	21.57	21.70
2431	NASDAQ	ATRC	Thu, Apr 9, 2015	21.72	22.00	21.32	21.70
2430	NASDAQ	ATRC	Wed, Apr 8, 2015	21.12	21.90	21.00	21.77
2429	NASDAQ	ATRC	Tue, Apr 7, 2015	21.58	21.87	21.08	21.14
2428	NASDAQ	ATRC	Mon, Apr 6, 2015	21.10	21.91	21.10	21.65
2427	NASDAQ	ATRC	Thu, Apr 2, 2015	20.80	21.75	20.60	21.68
2426	NASDAQ	ATRC	Wed, Apr 1, 2015	20.62	20.84	20.20	20.69
2425	NASDAQ	ATRC	Tue, Mar 31, 2015	20.81	20.95	20.19	20.49
2424	NASDAQ	ATRC	Mon, Mar 30, 2015	21.18	21.31	20.80	21.00
2423	NASDAQ	ATRC	Fri, Mar 27, 2015	21.10	21.68	20.91	21.20
2422	NASDAQ	ATRC	Thu, Mar 26, 2015	21.73	21.73	21.01	21.06
2421	NASDAQ	ATRC	Wed, Mar 25, 2015	22.86	22.97	21.68	21.88
2420	NASDAQ	ATRC	Tue, Mar 24, 2015	20.86	21.77	20.70	21.75
2419	NASDAQ	ATRC	Mon, Mar 23, 2015	20.77	20.90	20.41	20.84
2418	NASDAQ	ATRC	Fri, Mar 20, 2015	20.28	20.50	20.16	20.50
2417	NASDAQ	ATRC	Thu, Mar 19, 2015	19.46	20.17	19.35	20.13
2416	NASDAQ	ATRC	Wed, Mar 18, 2015	19.58	19.58	19.32	19.48
2415	NASDAQ	ATRC	Tue, Mar 17, 2015	19.54	19.83	19.32	19.51
2414	NASDAQ	ATRC	Mon, Mar 16, 2015	19.79	19.88	19.45	19.66
2413	NASDAQ	ATRC	Fri, Mar 13, 2015	19.31	19.78	19.14	19.73
2412	NASDAQ	ATRC	Thu, Mar 12, 2015	19.13	19.29	18.73	19.28
2411	NASDAQ	ATRC	Wed, Mar 11, 2015	18.87	19.25	18.75	18.95
2410	NASDAQ	ATRC	Tue, Mar 10, 2015	18.20	18.57	17.91	18.44
2409	NASDAQ	ATRC	Mon, Mar 9, 2015	18.21	19.02	18.13	18.41
2408	NASDAQ	ATRC	Fri, Mar 6, 2015	17.55	17.99	17.50	17.90
2407	NASDAQ	ATRC	Thu, Mar 5, 2015	17.42	17.86	17.42	17.72
2406	NASDAQ	ATRC	Wed, Mar 4, 2015	17.37	17.70	17.22	17.40
2405	NASDAQ	ATRC	Tue, Mar 3, 2015	17.65	17.70	17.38	17.47
2404	NASDAQ	ATRC	Mon, Mar 2, 2015	17.61	17.81	17.53	17.76
2403	NASDAQ	ATRC	Fri, Feb 27, 2015	17.90	17.93	17.61	17.68
2402	NASDAQ	ATRC	Thu, Feb 26, 2015	17.84	18.01	17.56	17.93
2401	NASDAQ	ATRC	Wed, Feb 25, 2015	17.71	17.97	17.69	17.82
2400	NASDAQ	ATRC	Tue, Feb 24, 2015	18.67	19.50	17.50	17.69
2399	NASDAQ	ATRC	Mon, Feb 23, 2015	18.24	18.41	17.96	18.21
2398	NASDAQ	ATRC	Fri, Feb 20, 2015	18.78	18.94	18.31	18.50
2397	NASDAQ	ATRC	Thu, Feb 19, 2015	18.42	18.90	18.29	18.70
2396	NASDAQ	ATRC	Wed, Feb 18, 2015	18.00	18.72	17.53	18.41
2395	NASDAQ	ATRC	Tue, Feb 17, 2015	18.18	18.75	17.81	18.07
2394	NASDAQ	ATRC	Fri, Feb 13, 2015	18.86	19.11	18.68	18.86
2393	NASDAQ	ATRC	Thu, Feb 12, 2015	19.00	19.00	18.50	18.82
2392	NASDAQ	ATRC	Wed, Feb 11, 2015	18.94	19.18	18.38	18.80
2391	NASDAQ	ATRC	Tue, Feb 10, 2015	19.06	19.14	18.66	18.94
2390	NASDAQ	ATRC	Mon, Feb 9, 2015	19.29	19.50	18.91	18.92
2389	NASDAQ	ATRC	Fri, Feb 6, 2015	19.75	19.97	19.21	19.34
2388	NASDAQ	ATRC	Thu, Feb 5, 2015	19.33	19.92	19.27	19.74
2387	NASDAQ	ATRC	Wed, Feb 4, 2015	19.36	19.47	19.00	19.03
2386	NASDAQ	ATRC	Tue, Feb 3, 2015	19.61	19.61	18.99	19.45
2385	NASDAQ	ATRC	Mon, Feb 2, 2015	19.89	19.89	19.15	19.53
2384	NASDAQ	ATRC	Fri, Jan 30, 2015	20.16	20.50	19.81	19.84
2383	NASDAQ	ATRC	Thu, Jan 29, 2015	19.90	20.45	19.71	20.35
2382	NASDAQ	ATRC	Wed, Jan 28, 2015	20.14	20.14	19.69	19.92
2381	NASDAQ	ATRC	Tue, Jan 27, 2015	19.81	20.08	19.65	19.98
2380	NASDAQ	ATRC	Mon, Jan 26, 2015	20.25	20.25	19.99	20.07
2379	NASDAQ	ATRC	Fri, Jan 23, 2015	19.86	20.32	19.65	20.22
2378	NASDAQ	ATRC	Thu, Jan 22, 2015	19.93	20.02	19.59	19.87
2377	NASDAQ	ATRC	Wed, Jan 21, 2015	20.56	20.66	19.52	19.76
2376	NASDAQ	ATRC	Tue, Jan 20, 2015	20.20	20.74	19.81	20.66
2375	NASDAQ	ATRC	Fri, Jan 16, 2015	19.79	20.22	19.72	20.12
2374	NASDAQ	ATRC	Thu, Jan 15, 2015	20.18	20.18	19.53	19.78
2373	NASDAQ	ATRC	Wed, Jan 14, 2015	20.13	20.82	20.09	20.10
2372	NASDAQ	ATRC	Tue, Jan 13, 2015	19.72	20.40	19.46	20.37
2371	NASDAQ	ATRC	Mon, Jan 12, 2015	18.90	19.50	18.57	19.46
2370	NASDAQ	ATRC	Fri, Jan 9, 2015	19.45	19.74	19.11	19.45
2369	NASDAQ	ATRC	Thu, Jan 8, 2015	19.32	19.63	19.10	19.37
2368	NASDAQ	ATRC	Wed, Jan 7, 2015	19.08	19.21	18.73	19.09
2367	NASDAQ	ATRC	Tue, Jan 6, 2015	19.73	19.81	18.69	18.93
2366	NASDAQ	ATRC	Mon, Jan 5, 2015	19.70	20.11	18.90	19.72
2365	NASDAQ	ATRC	Fri, Jan 2, 2015	20.07	20.14	19.10	19.78
2364	NASDAQ	ATRC	Wed, Dec 31, 2014	19.38	20.09	19.38	19.96
2363	NASDAQ	ATRC	Tue, Dec 30, 2014	19.09	19.27	18.85	19.21
2362	NASDAQ	ATRC	Mon, Dec 29, 2014	19.20	19.38	18.94	19.13
2361	NASDAQ	ATRC	Fri, Dec 26, 2014	18.82	19.38	18.76	19.18
2360	NASDAQ	ATRC	Wed, Dec 24, 2014	18.66	18.85	18.53	18.76
2359	NASDAQ	ATRC	Tue, Dec 23, 2014	19.16	18.94	18.54	18.63
2358	NASDAQ	ATRC	Mon, Dec 22, 2014	19.19	19.19	18.87	19.04
2357	NASDAQ	ATRC	Fri, Dec 19, 2014	19.22	19.50	19.00	19.24
2356	NASDAQ	ATRC	Thu, Dec 18, 2014	19.18	19.46	18.82	19.27
2355	NASDAQ	ATRC	Wed, Dec 17, 2014	17.59	18.97	17.37	18.94
2354	NASDAQ	ATRC	Tue, Dec 16, 2014	17.58	17.95	17.40	17.59
2353	NASDAQ	ATRC	Mon, Dec 15, 2014	18.26	18.44	17.24	17.60
2352	NASDAQ	ATRC	Fri, Dec 12, 2014	18.32	18.90	18.11	18.11
2351	NASDAQ	ATRC	Thu, Dec 11, 2014	18.65	18.99	18.45	18.57
2350	NASDAQ	ATRC	Wed, Dec 10, 2014	19.30	19.34	18.41	18.55
2349	NASDAQ	ATRC	Tue, Dec 9, 2014	18.39	19.47	18.33	19.41
2348	NASDAQ	ATRC	Mon, Dec 8, 2014	19.25	19.44	18.75	18.95
2347	NASDAQ	ATRC	Fri, Dec 5, 2014	18.47	19.41	18.43	19.27
2346	NASDAQ	ATRC	Thu, Dec 4, 2014	18.11	18.75	18.08	18.35
2345	NASDAQ	ATRC	Wed, Dec 3, 2014	18.60	18.71	18.13	18.17
2344	NASDAQ	ATRC	Tue, Dec 2, 2014	18.45	18.88	18.14	18.64
2343	NASDAQ	ATRC	Mon, Dec 1, 2014	18.64	18.64	18.25	18.37
2342	NASDAQ	ATRC	Fri, Nov 28, 2014	18.86	19.08	18.63	18.73
2341	NASDAQ	ATRC	Wed, Nov 26, 2014	18.55	19.00	18.55	18.86
2340	NASDAQ	ATRC	Tue, Nov 25, 2014	18.47	18.66	18.33	18.54
2339	NASDAQ	ATRC	Mon, Nov 24, 2014	17.80	18.43	17.80	18.41
2338	NASDAQ	ATRC	Fri, Nov 21, 2014	17.61	17.89	17.05	17.77
2337	NASDAQ	ATRC	Thu, Nov 20, 2014	17.10	17.35	16.80	17.33
2336	NASDAQ	ATRC	Wed, Nov 19, 2014	17.91	18.00	16.79	17.28
2335	NASDAQ	ATRC	Tue, Nov 18, 2014	18.18	18.50	17.89	17.95
2334	NASDAQ	ATRC	Mon, Nov 17, 2014	18.37	18.78	17.91	18.15
2333	NASDAQ	ATRC	Fri, Nov 14, 2014	18.01	18.51	17.86	18.46
2332	NASDAQ	ATRC	Thu, Nov 13, 2014	18.24	18.71	18.24	18.66
2331	NASDAQ	ATRC	Wed, Nov 12, 2014	17.82	18.30	17.73	18.24
2330	NASDAQ	ATRC	Tue, Nov 11, 2014	17.64	17.95	17.26	17.90
2329	NASDAQ	ATRC	Mon, Nov 10, 2014	16.84	17.70	16.70	17.69
2328	NASDAQ	ATRC	Fri, Nov 7, 2014	16.87	16.89	16.44	16.86
2327	NASDAQ	ATRC	Thu, Nov 6, 2014	16.72	16.90	16.47	16.85
2326	NASDAQ	ATRC	Wed, Nov 5, 2014	17.11	17.17	16.40	16.67
2325	NASDAQ	ATRC	Tue, Nov 4, 2014	16.74	17.23	16.52	16.97
2324	NASDAQ	ATRC	Mon, Nov 3, 2014	17.41	17.73	16.77	16.81
2323	NASDAQ	ATRC	Fri, Oct 31, 2014	18.84	18.84	17.06	17.44
2322	NASDAQ	ATRC	Thu, Oct 30, 2014	16.05	16.66	15.89	16.36
2321	NASDAQ	ATRC	Wed, Oct 29, 2014	15.42	16.25	15.29	16.20
2320	NASDAQ	ATRC	Tue, Oct 28, 2014	15.17	15.49	15.05	15.41
2319	NASDAQ	ATRC	Mon, Oct 27, 2014	15.15	15.37	14.92	15.07
2318	NASDAQ	ATRC	Fri, Oct 24, 2014	15.29	15.54	15.15	15.26
2317	NASDAQ	ATRC	Thu, Oct 23, 2014	15.19	15.68	15.05	15.25
2316	NASDAQ	ATRC	Wed, Oct 22, 2014	15.53	15.53	14.83	15.04
2315	NASDAQ	ATRC	Tue, Oct 21, 2014	15.31	15.66	14.87	15.44
2314	NASDAQ	ATRC	Mon, Oct 20, 2014	14.62	15.29	14.62	15.25
2313	NASDAQ	ATRC	Fri, Oct 17, 2014	15.64	15.76	14.65	14.67
2312	NASDAQ	ATRC	Thu, Oct 16, 2014	15.54	16.19	15.27	15.41
2311	NASDAQ	ATRC	Wed, Oct 15, 2014	15.03	15.87	14.90	15.79
2310	NASDAQ	ATRC	Tue, Oct 14, 2014	15.54	15.95	15.20	15.32
2309	NASDAQ	ATRC	Mon, Oct 13, 2014	15.37	15.64	15.05	15.35
2308	NASDAQ	ATRC	Fri, Oct 10, 2014	14.10	15.47	13.86	15.40
2307	NASDAQ	ATRC	Thu, Oct 9, 2014	14.08	14.49	13.78	14.14
2306	NASDAQ	ATRC	Wed, Oct 8, 2014	13.59	14.14	13.19	14.06
2305	NASDAQ	ATRC	Tue, Oct 7, 2014	13.91	13.99	13.61	13.64
2304	NASDAQ	ATRC	Mon, Oct 6, 2014	14.55	14.79	14.00	14.02
2303	NASDAQ	ATRC	Fri, Oct 3, 2014	14.75	15.01	14.31	14.54
2302	NASDAQ	ATRC	Thu, Oct 2, 2014	14.25	14.65	13.92	14.58
2301	NASDAQ	ATRC	Wed, Oct 1, 2014	14.68	14.68	14.05	14.21
2300	NASDAQ	ATRC	Tue, Sep 30, 2014	14.60	15.07	14.28	14.72
2299	NASDAQ	ATRC	Mon, Sep 29, 2014	14.30	14.76	14.30	14.66
2298	NASDAQ	ATRC	Fri, Sep 26, 2014	14.45	14.72	14.28	14.50
2297	NASDAQ	ATRC	Thu, Sep 25, 2014	14.75	14.76	14.28	14.43
2296	NASDAQ	ATRC	Wed, Sep 24, 2014	14.83	14.93	14.51	14.76
2295	NASDAQ	ATRC	Tue, Sep 23, 2014	14.76	15.06	14.63	14.76
2294	NASDAQ	ATRC	Mon, Sep 22, 2014	14.83	14.93	14.52	14.87
2293	NASDAQ	ATRC	Fri, Sep 19, 2014	15.43	15.43	14.55	14.98
2292	NASDAQ	ATRC	Thu, Sep 18, 2014	15.14	15.67	15.00	15.36
2291	NASDAQ	ATRC	Wed, Sep 17, 2014	15.08	15.29	14.92	15.07
2290	NASDAQ	ATRC	Tue, Sep 16, 2014	15.04	15.33	14.95	15.03
2289	NASDAQ	ATRC	Mon, Sep 15, 2014	15.77	15.77	15.06	15.12
2288	NASDAQ	ATRC	Fri, Sep 12, 2014	15.89	15.89	15.44	15.75
2287	NASDAQ	ATRC	Thu, Sep 11, 2014	15.65	16.00	15.50	15.93
2286	NASDAQ	ATRC	Wed, Sep 10, 2014	15.54	15.92	15.43	15.84
2285	NASDAQ	ATRC	Tue, Sep 9, 2014	15.83	15.98	15.50	15.58
2284	NASDAQ	ATRC	Mon, Sep 8, 2014	15.62	16.10	15.60	15.87
2283	NASDAQ	ATRC	Fri, Sep 5, 2014	15.43	15.67	15.33	15.63
2282	NASDAQ	ATRC	Thu, Sep 4, 2014	15.53	15.85	15.48	15.50
2281	NASDAQ	ATRC	Wed, Sep 3, 2014	15.89	15.89	15.28	15.41
2280	NASDAQ	ATRC	Tue, Sep 2, 2014	15.61	15.96	15.50	15.79
2279	NASDAQ	ATRC	Fri, Aug 29, 2014	15.60	15.66	15.44	15.52
2278	NASDAQ	ATRC	Thu, Aug 28, 2014	16.04	16.05	15.60	15.61
2277	NASDAQ	ATRC	Wed, Aug 27, 2014	16.33	16.37	16.09	16.11
2276	NASDAQ	ATRC	Tue, Aug 26, 2014	15.91	16.50	15.80	16.35
2275	NASDAQ	ATRC	Mon, Aug 25, 2014	15.88	16.20	15.88	15.91
2274	NASDAQ	ATRC	Fri, Aug 22, 2014	15.72	15.90	15.57	15.80
2273	NASDAQ	ATRC	Thu, Aug 21, 2014	15.88	16.05	15.72	15.74
2272	NASDAQ	ATRC	Wed, Aug 20, 2014	16.07	16.11	15.70	15.95
2271	NASDAQ	ATRC	Tue, Aug 19, 2014	15.80	16.16	15.73	16.11
2270	NASDAQ	ATRC	Mon, Aug 18, 2014	15.93	16.03	15.62	15.80
2269	NASDAQ	ATRC	Fri, Aug 15, 2014	16.01	16.04	15.57	15.69
2268	NASDAQ	ATRC	Thu, Aug 14, 2014	15.94	15.96	15.73	15.84
2267	NASDAQ	ATRC	Wed, Aug 13, 2014	15.69	15.97	15.54	15.94
2266	NASDAQ	ATRC	Tue, Aug 12, 2014	15.82	15.93	15.51	15.65
2265	NASDAQ	ATRC	Mon, Aug 11, 2014	16.07	16.25	15.90	15.93
2264	NASDAQ	ATRC	Fri, Aug 8, 2014	15.88	16.08	15.84	15.97
2263	NASDAQ	ATRC	Thu, Aug 7, 2014	15.89	16.08	15.71	15.81
2262	NASDAQ	ATRC	Wed, Aug 6, 2014	15.48	16.19	15.48	15.85
2261	NASDAQ	ATRC	Tue, Aug 5, 2014	15.70	16.12	15.46	15.61
2260	NASDAQ	ATRC	Mon, Aug 4, 2014	15.94	16.28	15.70	15.79
2259	NASDAQ	ATRC	Fri, Aug 1, 2014	16.49	16.49	15.77	15.85
2258	NASDAQ	ATRC	Thu, Jul 31, 2014	17.06	17.21	16.39	16.47
2257	NASDAQ	ATRC	Wed, Jul 30, 2014	17.40	17.43	17.14	17.24
2256	NASDAQ	ATRC	Tue, Jul 29, 2014	16.97	17.37	16.86	17.23
2255	NASDAQ	ATRC	Mon, Jul 28, 2014	17.05	17.14	16.44	16.95
2254	NASDAQ	ATRC	Fri, Jul 25, 2014	17.75	18.07	16.51	16.97
2253	NASDAQ	ATRC	Thu, Jul 24, 2014	15.72	16.05	15.67	15.91
2252	NASDAQ	ATRC	Wed, Jul 23, 2014	16.00	16.03	15.82	15.89
2251	NASDAQ	ATRC	Tue, Jul 22, 2014	15.83	16.01	15.67	15.97
2250	NASDAQ	ATRC	Mon, Jul 21, 2014	15.51	15.83	15.35	15.71
2249	NASDAQ	ATRC	Fri, Jul 18, 2014	15.28	15.79	15.19	15.61
2248	NASDAQ	ATRC	Thu, Jul 17, 2014	15.67	15.67	15.21	15.33
2247	NASDAQ	ATRC	Wed, Jul 16, 2014	16.38	16.38	15.68	15.78
2246	NASDAQ	ATRC	Tue, Jul 15, 2014	16.76	16.76	16.07	16.30
2245	NASDAQ	ATRC	Mon, Jul 14, 2014	17.02	17.15	16.57	16.73
2244	NASDAQ	ATRC	Fri, Jul 11, 2014	16.76	16.90	16.58	16.78
2243	NASDAQ	ATRC	Thu, Jul 10, 2014	16.29	16.95	16.25	16.78
2242	NASDAQ	ATRC	Wed, Jul 9, 2014	16.50	16.84	16.15	16.76
2241	NASDAQ	ATRC	Tue, Jul 8, 2014	17.23	17.23	16.18	16.47
2240	NASDAQ	ATRC	Mon, Jul 7, 2014	18.24	18.27	17.27	17.32
2239	NASDAQ	ATRC	Thu, Jul 3, 2014	18.07	18.28	17.92	18.26
2238	NASDAQ	ATRC	Wed, Jul 2, 2014	18.43	18.47	18.02	18.08
2237	NASDAQ	ATRC	Tue, Jul 1, 2014	18.46	18.66	18.36	18.47
2236	NASDAQ	ATRC	Mon, Jun 30, 2014	18.68	18.70	18.13	18.38
2235	NASDAQ	ATRC	Fri, Jun 27, 2014	18.75	19.00	18.49	18.67
2234	NASDAQ	ATRC	Thu, Jun 26, 2014	18.90	19.00	18.74	18.90
2233	NASDAQ	ATRC	Wed, Jun 25, 2014	18.68	19.16	18.58	18.91
2232	NASDAQ	ATRC	Tue, Jun 24, 2014	18.68	18.89	18.51	18.74
2231	NASDAQ	ATRC	Mon, Jun 23, 2014	18.91	19.00	18.70	18.75
2230	NASDAQ	ATRC	Fri, Jun 20, 2014	18.84	18.97	18.77	18.91
2229	NASDAQ	ATRC	Thu, Jun 19, 2014	18.74	18.81	18.37	18.72
2228	NASDAQ	ATRC	Wed, Jun 18, 2014	18.11	18.70	18.11	18.58
2227	NASDAQ	ATRC	Tue, Jun 17, 2014	17.70	18.37	17.55	18.15
2226	NASDAQ	ATRC	Mon, Jun 16, 2014	17.06	17.80	17.06	17.75
2225	NASDAQ	ATRC	Fri, Jun 13, 2014	17.05	17.23	16.77	17.02
2224	NASDAQ	ATRC	Thu, Jun 12, 2014	16.76	17.14	16.55	16.96
2223	NASDAQ	ATRC	Wed, Jun 11, 2014	17.03	17.47	16.82	16.85
2222	NASDAQ	ATRC	Tue, Jun 10, 2014	17.06	17.12	16.75	17.10
2221	NASDAQ	ATRC	Mon, Jun 9, 2014	16.63	17.20	16.37	17.10
2220	NASDAQ	ATRC	Fri, Jun 6, 2014	16.37	16.70	16.22	16.61
2219	NASDAQ	ATRC	Thu, Jun 5, 2014	15.83	16.39	15.76	16.24
2218	NASDAQ	ATRC	Wed, Jun 4, 2014	15.47	15.86	15.20	15.82
2217	NASDAQ	ATRC	Tue, Jun 3, 2014	16.01	16.24	15.55	15.60
2216	NASDAQ	ATRC	Mon, Jun 2, 2014	16.52	16.52	15.75	16.11
2215	NASDAQ	ATRC	Fri, May 30, 2014	16.62	16.62	16.15	16.52
2214	NASDAQ	ATRC	Thu, May 29, 2014	15.89	16.14	15.63	16.07
2213	NASDAQ	ATRC	Wed, May 28, 2014	15.82	16.05	15.58	15.76
2212	NASDAQ	ATRC	Tue, May 27, 2014	15.77	16.11	15.53	15.92
2211	NASDAQ	ATRC	Fri, May 23, 2014	15.36	15.69	15.03	15.59
2210	NASDAQ	ATRC	Thu, May 22, 2014	15.50	15.58	15.25	15.33
2209	NASDAQ	ATRC	Wed, May 21, 2014	15.53	15.84	15.29	15.50
2208	NASDAQ	ATRC	Tue, May 20, 2014	15.67	15.72	15.24	15.48
2207	NASDAQ	ATRC	Mon, May 19, 2014	15.50	15.89	15.50	15.72
2206	NASDAQ	ATRC	Fri, May 16, 2014	15.58	15.65	15.33	15.60
2205	NASDAQ	ATRC	Thu, May 15, 2014	15.83	15.90	15.25	15.60
2204	NASDAQ	ATRC	Wed, May 14, 2014	16.16	16.51	15.87	15.96
2203	NASDAQ	ATRC	Tue, May 13, 2014	16.48	16.89	15.95	16.24
2202	NASDAQ	ATRC	Mon, May 12, 2014	15.57	16.78	15.57	16.47
2201	NASDAQ	ATRC	Fri, May 9, 2014	14.48	15.65	14.15	15.44
2200	NASDAQ	ATRC	Thu, May 8, 2014	14.11	14.72	14.11	14.30
2199	NASDAQ	ATRC	Wed, May 7, 2014	15.13	15.13	13.80	14.19
2198	NASDAQ	ATRC	Tue, May 6, 2014	15.27	15.49	14.90	15.09
2197	NASDAQ	ATRC	Mon, May 5, 2014	15.02	15.48	14.82	15.31
2196	NASDAQ	ATRC	Fri, May 2, 2014	15.50	15.69	15.10	15.12
2195	NASDAQ	ATRC	Thu, May 1, 2014	15.34	15.74	14.89	15.40
2194	NASDAQ	ATRC	Wed, Apr 30, 2014	15.66	15.98	15.16	15.40
2193	NASDAQ	ATRC	Tue, Apr 29, 2014	16.09	16.41	15.63	15.76
2192	NASDAQ	ATRC	Mon, Apr 28, 2014	16.70	16.76	15.50	16.01
2191	NASDAQ	ATRC	Fri, Apr 25, 2014	16.27	17.50	16.19	16.66
2190	NASDAQ	ATRC	Thu, Apr 24, 2014	17.34	17.49	16.50	16.68
2189	NASDAQ	ATRC	Wed, Apr 23, 2014	16.80	17.54	16.38	17.18
2188	NASDAQ	ATRC	Tue, Apr 22, 2014	16.56	16.90	16.23	16.82
2187	NASDAQ	ATRC	Mon, Apr 21, 2014	16.37	16.56	16.00	16.48
2186	NASDAQ	ATRC	Thu, Apr 17, 2014	16.04	16.45	15.83	16.31
2185	NASDAQ	ATRC	Wed, Apr 16, 2014	16.37	16.74	15.94	16.10
2184	NASDAQ	ATRC	Tue, Apr 15, 2014	16.17	16.33	15.29	16.19
2183	NASDAQ	ATRC	Mon, Apr 14, 2014	16.47	16.60	15.85	16.10
2182	NASDAQ	ATRC	Fri, Apr 11, 2014	15.81	16.35	15.58	16.26
2181	NASDAQ	ATRC	Thu, Apr 10, 2014	16.62	16.91	15.51	15.95
2180	NASDAQ	ATRC	Wed, Apr 9, 2014	16.75	16.91	15.95	16.62
2179	NASDAQ	ATRC	Tue, Apr 8, 2014	16.43	17.01	16.43	16.64
2178	NASDAQ	ATRC	Mon, Apr 7, 2014	17.36	17.41	16.47	16.49
2177	NASDAQ	ATRC	Fri, Apr 4, 2014	18.71	18.71	17.38	17.48
2176	NASDAQ	ATRC	Thu, Apr 3, 2014	19.18	19.31	18.45	18.60
2175	NASDAQ	ATRC	Wed, Apr 2, 2014	19.19	19.29	18.93	19.25
2174	NASDAQ	ATRC	Tue, Apr 1, 2014	18.88	19.67	18.70	19.09
2173	NASDAQ	ATRC	Mon, Mar 31, 2014	18.20	18.90	18.06	18.81
2172	NASDAQ	ATRC	Fri, Mar 28, 2014	18.22	18.55	17.64	18.10
2171	NASDAQ	ATRC	Thu, Mar 27, 2014	18.16	18.35	17.57	18.23
2170	NASDAQ	ATRC	Wed, Mar 26, 2014	19.46	19.56	18.21	18.23
2169	NASDAQ	ATRC	Tue, Mar 25, 2014	19.56	19.81	19.12	19.35
2168	NASDAQ	ATRC	Mon, Mar 24, 2014	20.14	20.46	19.19	19.39
2167	NASDAQ	ATRC	Fri, Mar 21, 2014	20.98	20.98	19.75	20.02
2166	NASDAQ	ATRC	Thu, Mar 20, 2014	20.86	21.19	20.64	20.86
2165	NASDAQ	ATRC	Wed, Mar 19, 2014	21.43	21.43	20.59	20.92
2164	NASDAQ	ATRC	Tue, Mar 18, 2014	20.48	21.63	20.22	21.39
2163	NASDAQ	ATRC	Mon, Mar 17, 2014	20.40	20.91	20.15	20.39
2162	NASDAQ	ATRC	Fri, Mar 14, 2014	20.03	20.34	19.50	20.31
2161	NASDAQ	ATRC	Thu, Mar 13, 2014	20.51	20.51	20.02	20.17
2160	NASDAQ	ATRC	Wed, Mar 12, 2014	20.19	20.50	20.02	20.37
2159	NASDAQ	ATRC	Tue, Mar 11, 2014	20.65	21.02	20.13	20.39
2158	NASDAQ	ATRC	Mon, Mar 10, 2014	20.25	20.86	20.24	20.56
2157	NASDAQ	ATRC	Fri, Mar 7, 2014	20.75	20.81	20.17	20.39
2156	NASDAQ	ATRC	Thu, Mar 6, 2014	20.80	20.96	20.39	20.58
2155	NASDAQ	ATRC	Wed, Mar 5, 2014	20.85	21.23	20.38	20.90
2154	NASDAQ	ATRC	Tue, Mar 4, 2014	20.80	21.18	20.61	20.98
2153	NASDAQ	ATRC	Mon, Mar 3, 2014	20.55	20.79	20.20	20.60
2152	NASDAQ	ATRC	Fri, Feb 28, 2014	21.47	21.54	20.23	20.79
2151	NASDAQ	ATRC	Thu, Feb 27, 2014	21.50	21.81	21.24	21.58
2150	NASDAQ	ATRC	Wed, Feb 26, 2014	21.39	21.74	21.18	21.48
2149	NASDAQ	ATRC	Tue, Feb 25, 2014	21.21	21.33	20.84	21.30
2148	NASDAQ	ATRC	Mon, Feb 24, 2014	21.59	22.11	20.89	21.28
2147	NASDAQ	ATRC	Fri, Feb 21, 2014	22.10	22.21	21.45	21.47
2146	NASDAQ	ATRC	Thu, Feb 20, 2014	21.02	22.20	20.99	22.01
2145	NASDAQ	ATRC	Wed, Feb 19, 2014	21.10	21.64	21.00	21.06
2144	NASDAQ	ATRC	Tue, Feb 18, 2014	20.98	21.46	20.93	21.25
2143	NASDAQ	ATRC	Fri, Feb 14, 2014	21.18	21.49	20.93	21.01
2142	NASDAQ	ATRC	Thu, Feb 13, 2014	19.80	21.04	19.56	21.03
2141	NASDAQ	ATRC	Wed, Feb 12, 2014	20.21	20.57	19.99	20.27
2140	NASDAQ	ATRC	Tue, Feb 11, 2014	20.48	20.55	20.10	20.26
2139	NASDAQ	ATRC	Mon, Feb 10, 2014	20.74	20.74	20.10	20.48
2138	NASDAQ	ATRC	Fri, Feb 7, 2014	20.75	21.03	20.64	20.80
2137	NASDAQ	ATRC	Thu, Feb 6, 2014	21.06	21.20	20.71	20.77
2136	NASDAQ	ATRC	Wed, Feb 5, 2014	20.70	21.05	20.10	20.98
2135	NASDAQ	ATRC	Tue, Feb 4, 2014	20.27	21.18	20.03	20.90
2134	NASDAQ	ATRC	Mon, Feb 3, 2014	20.38	21.12	19.82	20.22
2133	NASDAQ	ATRC	Fri, Jan 31, 2014	20.38	21.05	20.25	20.50
2132	NASDAQ	ATRC	Thu, Jan 30, 2014	20.78	21.37	20.70	20.83
2131	NASDAQ	ATRC	Wed, Jan 29, 2014	20.35	20.92	20.26	20.60
2130	NASDAQ	ATRC	Tue, Jan 28, 2014	20.75	21.06	20.42	20.59
2129	NASDAQ	ATRC	Mon, Jan 27, 2014	21.00	22.52	20.25	20.77
2128	NASDAQ	ATRC	Fri, Jan 24, 2014	21.48	21.73	20.37	21.04
2127	NASDAQ	ATRC	Thu, Jan 23, 2014	22.05	22.97	21.40	21.65
2126	NASDAQ	ATRC	Wed, Jan 22, 2014	21.68	22.25	21.03	22.18
2125	NASDAQ	ATRC	Tue, Jan 21, 2014	21.96	22.00	21.39	21.66
2124	NASDAQ	ATRC	Fri, Jan 17, 2014	21.74	21.97	21.49	21.73
2123	NASDAQ	ATRC	Thu, Jan 16, 2014	21.22	21.93	21.22	21.79
2122	NASDAQ	ATRC	Wed, Jan 15, 2014	21.97	22.35	21.08	21.33
2121	NASDAQ	ATRC	Tue, Jan 14, 2014	20.97	22.43	20.97	21.99
2120	NASDAQ	ATRC	Mon, Jan 13, 2014	22.21	22.64	20.54	20.96
2119	NASDAQ	ATRC	Fri, Jan 10, 2014	22.99	23.00	20.80	22.13
2118	NASDAQ	ATRC	Thu, Jan 9, 2014	18.85	19.21	18.65	19.01
2117	NASDAQ	ATRC	Wed, Jan 8, 2014	18.03	18.87	18.03	18.83
2116	NASDAQ	ATRC	Tue, Jan 7, 2014	18.32	18.40	17.90	18.05
2115	NASDAQ	ATRC	Mon, Jan 6, 2014	18.23	18.45	17.70	18.30
2114	NASDAQ	ATRC	Fri, Jan 3, 2014	18.05	18.33	17.73	18.11
2113	NASDAQ	ATRC	Thu, Jan 2, 2014	18.60	18.60	17.74	18.03
2112	NASDAQ	ATRC	Tue, Dec 31, 2013	18.64	18.95	18.23	18.68
2111	NASDAQ	ATRC	Mon, Dec 30, 2013	18.98	19.02	18.33	18.62
2110	NASDAQ	ATRC	Fri, Dec 27, 2013	18.81	19.11	18.70	18.93
2109	NASDAQ	ATRC	Thu, Dec 26, 2013	18.66	18.98	18.64	18.73
2108	NASDAQ	ATRC	Tue, Dec 24, 2013	18.18	18.65	18.00	18.52
2107	NASDAQ	ATRC	Mon, Dec 23, 2013	18.16	18.36	16.98	18.10
2106	NASDAQ	ATRC	Fri, Dec 20, 2013	16.10	18.17	16.04	18.03
2105	NASDAQ	ATRC	Thu, Dec 19, 2013	16.35	16.39	15.81	15.93
2104	NASDAQ	ATRC	Wed, Dec 18, 2013	16.40	16.40	16.03	16.32
2103	NASDAQ	ATRC	Tue, Dec 17, 2013	16.23	16.40	15.72	16.39
2102	NASDAQ	ATRC	Mon, Dec 16, 2013	15.96	16.37	15.88	16.36
2101	NASDAQ	ATRC	Fri, Dec 13, 2013	15.82	15.99	15.52	15.85
2100	NASDAQ	ATRC	Thu, Dec 12, 2013	15.71	15.99	15.38	15.74
2099	NASDAQ	ATRC	Wed, Dec 11, 2013	15.94	16.13	15.39	15.66
2098	NASDAQ	ATRC	Tue, Dec 10, 2013	16.14	16.35	15.64	15.96
2097	NASDAQ	ATRC	Mon, Dec 9, 2013	16.15	16.67	16.00	16.22
2096	NASDAQ	ATRC	Fri, Dec 6, 2013	16.03	16.15	15.88	16.09
2095	NASDAQ	ATRC	Thu, Dec 5, 2013	15.97	16.00	15.50	15.95
2094	NASDAQ	ATRC	Wed, Dec 4, 2013	15.30	15.99	15.24	15.92
2093	NASDAQ	ATRC	Tue, Dec 3, 2013	15.44	15.63	14.78	15.38
2092	NASDAQ	ATRC	Mon, Dec 2, 2013	15.67	15.79	15.34	15.50
2091	NASDAQ	ATRC	Fri, Nov 29, 2013	16.17	16.40	15.61	15.66
2090	NASDAQ	ATRC	Wed, Nov 27, 2013	15.48	16.20	15.31	16.05
2089	NASDAQ	ATRC	Tue, Nov 26, 2013	15.00	15.54	15.00	15.52
2088	NASDAQ	ATRC	Mon, Nov 25, 2013	15.32	15.48	14.87	15.01
2087	NASDAQ	ATRC	Fri, Nov 22, 2013	15.06	15.40	14.79	15.32
2086	NASDAQ	ATRC	Thu, Nov 21, 2013	14.93	15.17	14.77	15.01
2085	NASDAQ	ATRC	Wed, Nov 20, 2013	14.68	15.00	14.39	14.88
2084	NASDAQ	ATRC	Tue, Nov 19, 2013	14.41	14.86	13.96	14.55
2083	NASDAQ	ATRC	Mon, Nov 18, 2013	15.42	15.42	14.18	14.35
2082	NASDAQ	ATRC	Fri, Nov 15, 2013	15.13	15.42	14.99	15.34
2081	NASDAQ	ATRC	Thu, Nov 14, 2013	14.89	15.23	14.89	15.04
2080	NASDAQ	ATRC	Wed, Nov 13, 2013	14.69	14.99	14.58	14.94
2079	NASDAQ	ATRC	Tue, Nov 12, 2013	14.34	14.71	14.34	14.69
2078	NASDAQ	ATRC	Mon, Nov 11, 2013	14.48	14.55	14.18	14.34
2077	NASDAQ	ATRC	Fri, Nov 8, 2013	13.85	14.53	13.85	14.46
2076	NASDAQ	ATRC	Thu, Nov 7, 2013	14.00	14.11	13.69	13.85
2075	NASDAQ	ATRC	Wed, Nov 6, 2013	14.23	14.23	13.80	14.01
2074	NASDAQ	ATRC	Tue, Nov 5, 2013	13.89	14.20	13.80	14.19
2073	NASDAQ	ATRC	Mon, Nov 4, 2013	14.04	14.06	13.76	14.00
2072	NASDAQ	ATRC	Fri, Nov 1, 2013	13.75	14.31	13.28	13.95
2071	NASDAQ	ATRC	Thu, Oct 31, 2013	13.91	14.15	13.75	13.85
2070	NASDAQ	ATRC	Wed, Oct 30, 2013	13.63	14.15	13.25	13.80
2069	NASDAQ	ATRC	Tue, Oct 29, 2013	12.73	12.79	12.25	12.45
2068	NASDAQ	ATRC	Mon, Oct 28, 2013	12.60	12.88	12.32	12.71
2067	NASDAQ	ATRC	Fri, Oct 25, 2013	12.56	12.74	12.34	12.57
2066	NASDAQ	ATRC	Thu, Oct 24, 2013	12.29	12.79	12.27	12.59
2065	NASDAQ	ATRC	Wed, Oct 23, 2013	12.46	12.80	12.22	12.28
2064	NASDAQ	ATRC	Tue, Oct 22, 2013	12.55	12.89	12.26	12.49
2063	NASDAQ	ATRC	Mon, Oct 21, 2013	13.00	13.04	12.50	12.52
2062	NASDAQ	ATRC	Fri, Oct 18, 2013	12.79	12.95	12.74	12.95
2061	NASDAQ	ATRC	Thu, Oct 17, 2013	12.36	12.85	12.36	12.75
2060	NASDAQ	ATRC	Wed, Oct 16, 2013	12.40	12.93	12.24	12.44
2059	NASDAQ	ATRC	Tue, Oct 15, 2013	12.37	12.52	12.33	12.36
2058	NASDAQ	ATRC	Mon, Oct 14, 2013	12.29	12.57	12.23	12.37
2057	NASDAQ	ATRC	Fri, Oct 11, 2013	11.68	12.62	11.68	12.40
2056	NASDAQ	ATRC	Thu, Oct 10, 2013	11.57	11.80	11.47	11.73
2055	NASDAQ	ATRC	Wed, Oct 9, 2013	11.49	11.57	11.32	11.46
2054	NASDAQ	ATRC	Tue, Oct 8, 2013	11.50	11.59	11.13	11.42
2053	NASDAQ	ATRC	Mon, Oct 7, 2013	11.44	11.62	11.28	11.48
2052	NASDAQ	ATRC	Fri, Oct 4, 2013	11.54	11.61	11.23	11.51
2051	NASDAQ	ATRC	Thu, Oct 3, 2013	11.34	11.63	11.16	11.57
2050	NASDAQ	ATRC	Wed, Oct 2, 2013	11.45	11.54	11.19	11.28
2049	NASDAQ	ATRC	Tue, Oct 1, 2013	11.00	11.69	11.00	11.50
2048	NASDAQ	ATRC	Mon, Sep 30, 2013	10.84	11.00	10.60	10.98
2047	NASDAQ	ATRC	Fri, Sep 27, 2013	10.74	11.10	10.55	10.96
2046	NASDAQ	ATRC	Thu, Sep 26, 2013	10.79	10.97	10.71	10.82
2045	NASDAQ	ATRC	Wed, Sep 25, 2013	10.76	10.92	10.45	10.74
2044	NASDAQ	ATRC	Tue, Sep 24, 2013	10.94	10.95	10.72	10.75
2043	NASDAQ	ATRC	Mon, Sep 23, 2013	10.91	11.03	10.88	10.93
2042	NASDAQ	ATRC	Fri, Sep 20, 2013	11.10	11.10	10.50	10.88
2041	NASDAQ	ATRC	Thu, Sep 19, 2013	11.21	11.25	10.79	11.01
2040	NASDAQ	ATRC	Wed, Sep 18, 2013	10.69	11.23	10.68	11.14
2039	NASDAQ	ATRC	Tue, Sep 17, 2013	10.41	10.75	10.41	10.69
2038	NASDAQ	ATRC	Mon, Sep 16, 2013	10.19	10.43	10.15	10.41
2037	NASDAQ	ATRC	Fri, Sep 13, 2013	9.99	10.18	9.95	10.11
2036	NASDAQ	ATRC	Thu, Sep 12, 2013	9.88	10.01	9.80	9.94
2035	NASDAQ	ATRC	Wed, Sep 11, 2013	9.84	9.92	9.79	9.90
2034	NASDAQ	ATRC	Tue, Sep 10, 2013	9.88	9.98	9.54	9.89
2033	NASDAQ	ATRC	Mon, Sep 9, 2013	9.64	9.85	9.55	9.85
2032	NASDAQ	ATRC	Fri, Sep 6, 2013	9.56	9.63	9.32	9.58
2031	NASDAQ	ATRC	Thu, Sep 5, 2013	9.43	9.59	9.41	9.50
2030	NASDAQ	ATRC	Wed, Sep 4, 2013	9.02	9.47	9.02	9.44
2029	NASDAQ	ATRC	Tue, Sep 3, 2013	8.88	9.00	8.78	8.98
2028	NASDAQ	ATRC	Fri, Aug 30, 2013	8.80	8.84	8.59	8.79
2027	NASDAQ	ATRC	Thu, Aug 29, 2013	8.64	8.85	8.58	8.81
2026	NASDAQ	ATRC	Wed, Aug 28, 2013	8.74	8.99	8.48	8.62
2025	NASDAQ	ATRC	Tue, Aug 27, 2013	9.31	9.46	8.98	8.99
2024	NASDAQ	ATRC	Mon, Aug 26, 2013	9.69	9.75	9.35	9.38
2023	NASDAQ	ATRC	Fri, Aug 23, 2013	9.84	9.90	9.58	9.66
2022	NASDAQ	ATRC	Thu, Aug 22, 2013	9.66	9.90	9.66	9.84
2021	NASDAQ	ATRC	Wed, Aug 21, 2013	9.70	9.82	9.58	9.61
2020	NASDAQ	ATRC	Tue, Aug 20, 2013	9.48	9.73	9.48	9.70
2019	NASDAQ	ATRC	Mon, Aug 19, 2013	9.20	9.56	9.20	9.49
2018	NASDAQ	ATRC	Fri, Aug 16, 2013	9.30	9.43	9.19	9.26
2017	NASDAQ	ATRC	Thu, Aug 15, 2013	9.44	9.44	9.28	9.36
2016	NASDAQ	ATRC	Wed, Aug 14, 2013	9.39	9.50	9.33	9.43
2015	NASDAQ	ATRC	Tue, Aug 13, 2013	9.42	9.46	9.20	9.37
2014	NASDAQ	ATRC	Mon, Aug 12, 2013	9.58	9.58	9.36	9.49
2013	NASDAQ	ATRC	Fri, Aug 9, 2013	9.75	9.82	9.52	9.53
2012	NASDAQ	ATRC	Thu, Aug 8, 2013	9.86	9.87	9.77	9.80
2011	NASDAQ	ATRC	Wed, Aug 7, 2013	9.86	9.93	9.79	9.80
2010	NASDAQ	ATRC	Tue, Aug 6, 2013	9.90	9.94	9.76	9.88
2009	NASDAQ	ATRC	Mon, Aug 5, 2013	9.85	10.03	9.85	9.89
2008	NASDAQ	ATRC	Fri, Aug 2, 2013	9.98	10.15	9.73	9.90
2007	NASDAQ	ATRC	Thu, Aug 1, 2013	9.69	9.90	9.74	9.80
2006	NASDAQ	ATRC	Wed, Jul 31, 2013	9.74	9.89	9.63	9.66
2005	NASDAQ	ATRC	Tue, Jul 30, 2013	9.65	9.80	9.59	9.66
2004	NASDAQ	ATRC	Mon, Jul 29, 2013	9.80	9.80	9.56	9.57
2003	NASDAQ	ATRC	Fri, Jul 26, 2013	9.85	9.90	9.75	9.80
2002	NASDAQ	ATRC	Thu, Jul 25, 2013	9.90	9.90	9.85	9.90
2001	NASDAQ	ATRC	Wed, Jul 24, 2013	9.92	9.92	9.84	9.90
2000	NASDAQ	ATRC	Tue, Jul 23, 2013	9.90	9.91	9.83	9.87
1999	NASDAQ	ATRC	Mon, Jul 22, 2013	9.69	9.90	9.60	9.86
1998	NASDAQ	ATRC	Fri, Jul 19, 2013	9.82	9.84	9.44	9.75
1997	NASDAQ	ATRC	Thu, Jul 18, 2013	9.87	9.90	9.80	9.89
1996	NASDAQ	ATRC	Wed, Jul 17, 2013	9.90	9.90	9.66	9.82
1995	NASDAQ	ATRC	Tue, Jul 16, 2013	9.90	9.92	9.72	9.89
1994	NASDAQ	ATRC	Mon, Jul 15, 2013	9.90	9.98	9.89	9.90
1993	NASDAQ	ATRC	Fri, Jul 12, 2013	9.94	10.00	9.87	9.89
1992	NASDAQ	ATRC	Thu, Jul 11, 2013	10.00	10.00	9.92	9.98
1991	NASDAQ	ATRC	Wed, Jul 10, 2013	9.91	9.99	9.84	9.96
1990	NASDAQ	ATRC	Tue, Jul 9, 2013	9.97	9.99	9.71	9.89
1989	NASDAQ	ATRC	Mon, Jul 8, 2013	9.85	9.99	9.70	9.97
1988	NASDAQ	ATRC	Fri, Jul 5, 2013	9.77	9.85	9.66	9.85
1987	NASDAQ	ATRC	Wed, Jul 3, 2013	9.69	9.72	9.44	9.69
1986	NASDAQ	ATRC	Tue, Jul 2, 2013	9.55	9.72	9.45	9.72
1985	NASDAQ	ATRC	Mon, Jul 1, 2013	9.50	9.71	9.35	9.52
1984	NASDAQ	ATRC	Fri, Jun 28, 2013	9.45	9.50	9.24	9.50
1983	NASDAQ	ATRC	Thu, Jun 27, 2013	9.44	9.52	9.36	9.45
1982	NASDAQ	ATRC	Wed, Jun 26, 2013	9.41	9.54	9.19	9.39
1981	NASDAQ	ATRC	Tue, Jun 25, 2013	9.26	9.38	9.12	9.38
1980	NASDAQ	ATRC	Mon, Jun 24, 2013	9.00	9.20	9.00	9.16
1979	NASDAQ	ATRC	Fri, Jun 21, 2013	9.09	9.20	8.93	9.07
1978	NASDAQ	ATRC	Thu, Jun 20, 2013	8.88	9.10	8.82	9.05
1977	NASDAQ	ATRC	Wed, Jun 19, 2013	9.09	9.14	8.86	9.00
1976	NASDAQ	ATRC	Tue, Jun 18, 2013	9.19	9.25	9.04	9.12
1975	NASDAQ	ATRC	Mon, Jun 17, 2013	9.08	9.28	9.05	9.19
1974	NASDAQ	ATRC	Fri, Jun 14, 2013	9.05	9.11	8.94	9.00
1973	NASDAQ	ATRC	Thu, Jun 13, 2013	8.99	9.05	8.83	9.04
1972	NASDAQ	ATRC	Wed, Jun 12, 2013	9.08	9.23	8.92	8.96
1971	NASDAQ	ATRC	Tue, Jun 11, 2013	9.22	9.22	8.97	9.04
1970	NASDAQ	ATRC	Mon, Jun 10, 2013	9.10	9.34	9.07	9.29
1969	NASDAQ	ATRC	Fri, Jun 7, 2013	9.16	9.16	8.95	9.04
1968	NASDAQ	ATRC	Thu, Jun 6, 2013	9.20	9.24	8.92	9.07
1967	NASDAQ	ATRC	Wed, Jun 5, 2013	9.20	9.28	9.17	9.21
1966	NASDAQ	ATRC	Tue, Jun 4, 2013	9.35	9.37	9.10	9.21
1965	NASDAQ	ATRC	Mon, Jun 3, 2013	9.05	9.51	8.96	9.38
1964	NASDAQ	ATRC	Fri, May 31, 2013	8.80	9.09	8.64	9.05
1963	NASDAQ	ATRC	Thu, May 30, 2013	9.30	9.30	8.80	8.86
1962	NASDAQ	ATRC	Wed, May 29, 2013	9.25	9.49	9.21	9.31
1961	NASDAQ	ATRC	Tue, May 28, 2013	9.43	9.75	9.34	9.54
1960	NASDAQ	ATRC	Fri, May 24, 2013	9.21	9.45	9.20	9.28
1959	NASDAQ	ATRC	Thu, May 23, 2013	9.07	9.30	9.07	9.30
1958	NASDAQ	ATRC	Wed, May 22, 2013	8.99	9.15	8.95	9.14
1957	NASDAQ	ATRC	Tue, May 21, 2013	9.01	9.24	8.90	8.99
1956	NASDAQ	ATRC	Mon, May 20, 2013	9.01	9.23	8.96	9.05
1955	NASDAQ	ATRC	Fri, May 17, 2013	9.15	9.29	8.98	9.07
1954	NASDAQ	ATRC	Thu, May 16, 2013	8.97	9.34	8.81	9.25
1953	NASDAQ	ATRC	Wed, May 15, 2013	9.19	9.19	8.89	8.97
1952	NASDAQ	ATRC	Tue, May 14, 2013	9.28	9.37	9.15	9.24
1951	NASDAQ	ATRC	Mon, May 13, 2013	9.53	9.60	9.20	9.25
1950	NASDAQ	ATRC	Fri, May 10, 2013	9.19	9.60	9.19	9.57
1949	NASDAQ	ATRC	Thu, May 9, 2013	9.45	9.61	8.87	9.20
1948	NASDAQ	ATRC	Wed, May 8, 2013	8.84	9.61	8.84	9.52
1947	NASDAQ	ATRC	Tue, May 7, 2013	8.60	8.93	8.60	8.90
1946	NASDAQ	ATRC	Mon, May 6, 2013	8.37	8.63	8.37	8.62
1945	NASDAQ	ATRC	Fri, May 3, 2013	7.99	8.49	7.99	8.40
1944	NASDAQ	ATRC	Thu, May 2, 2013	7.76	8.11	7.65	7.90
1943	NASDAQ	ATRC	Wed, May 1, 2013	8.28	8.34	7.68	7.75
1942	NASDAQ	ATRC	Tue, Apr 30, 2013	7.79	8.35	7.79	8.34
1941	NASDAQ	ATRC	Mon, Apr 29, 2013	7.76	7.90	7.68	7.87
1940	NASDAQ	ATRC	Fri, Apr 26, 2013	7.64	7.80	7.56	7.76
1939	NASDAQ	ATRC	Thu, Apr 25, 2013	7.73	7.82	7.61	7.70
1938	NASDAQ	ATRC	Wed, Apr 24, 2013	8.09	8.09	7.68	7.72
1937	NASDAQ	ATRC	Tue, Apr 23, 2013	8.03	8.07	7.84	8.07
1936	NASDAQ	ATRC	Mon, Apr 22, 2013	7.96	8.03	7.70	7.98
1935	NASDAQ	ATRC	Fri, Apr 19, 2013	7.51	7.99	7.51	7.94
1934	NASDAQ	ATRC	Thu, Apr 18, 2013	7.69	7.69	7.48	7.51
1933	NASDAQ	ATRC	Wed, Apr 17, 2013	7.67	7.75	7.48	7.65
1932	NASDAQ	ATRC	Tue, Apr 16, 2013	7.83	7.78	7.64	7.74
1931	NASDAQ	ATRC	Mon, Apr 15, 2013	7.92	7.92	7.62	7.76
1930	NASDAQ	ATRC	Fri, Apr 12, 2013	8.21	8.21	7.92	7.95
1929	NASDAQ	ATRC	Thu, Apr 11, 2013	8.35	8.44	8.25	8.28
1928	NASDAQ	ATRC	Wed, Apr 10, 2013	8.10	8.39	8.01	8.39
1927	NASDAQ	ATRC	Tue, Apr 9, 2013	8.07	8.15	8.02	8.05
1926	NASDAQ	ATRC	Mon, Apr 8, 2013	8.12	8.12	7.91	8.08
1925	NASDAQ	ATRC	Fri, Apr 5, 2013	8.00	8.23	8.00	8.07
1924	NASDAQ	ATRC	Thu, Apr 4, 2013	8.20	8.22	8.06	8.15
1923	NASDAQ	ATRC	Wed, Apr 3, 2013	8.48	8.48	8.06	8.16
1922	NASDAQ	ATRC	Tue, Apr 2, 2013	8.26	8.55	8.20	8.49
1921	NASDAQ	ATRC	Mon, Apr 1, 2013	7.88	8.26	7.88	8.19
1920	NASDAQ	ATRC	Thu, Mar 28, 2013	7.99	7.99	7.83	7.92
1919	NASDAQ	ATRC	Wed, Mar 27, 2013	7.83	8.00	7.57	7.99
1918	NASDAQ	ATRC	Tue, Mar 26, 2013	8.05	8.05	7.81	7.91
1917	NASDAQ	ATRC	Mon, Mar 25, 2013	8.05	8.05	7.93	8.00
1916	NASDAQ	ATRC	Fri, Mar 22, 2013	8.07	8.17	7.99	7.99
1915	NASDAQ	ATRC	Thu, Mar 21, 2013	8.09	8.24	8.05	8.08
1914	NASDAQ	ATRC	Wed, Mar 20, 2013	8.44	8.44	8.21	8.29
1913	NASDAQ	ATRC	Tue, Mar 19, 2013	8.49	8.50	8.37	8.40
1912	NASDAQ	ATRC	Mon, Mar 18, 2013	8.57	8.64	8.42	8.49
1911	NASDAQ	ATRC	Fri, Mar 15, 2013	8.51	8.70	8.36	8.68
1910	NASDAQ	ATRC	Thu, Mar 14, 2013	8.46	8.55	8.41	8.55
1909	NASDAQ	ATRC	Wed, Mar 13, 2013	8.36	8.46	8.30	8.46
1908	NASDAQ	ATRC	Tue, Mar 12, 2013	8.47	8.48	8.26	8.35
1907	NASDAQ	ATRC	Mon, Mar 11, 2013	8.34	8.50	8.23	8.48
1906	NASDAQ	ATRC	Fri, Mar 8, 2013	8.10	8.35	7.98	8.34
1905	NASDAQ	ATRC	Thu, Mar 7, 2013	8.14	8.14	7.96	8.03
1904	NASDAQ	ATRC	Wed, Mar 6, 2013	8.01	8.26	7.96	8.12
1903	NASDAQ	ATRC	Tue, Mar 5, 2013	8.34	8.38	7.88	8.00
1902	NASDAQ	ATRC	Mon, Mar 4, 2013	8.50	8.60	8.07	8.31
1901	NASDAQ	ATRC	Fri, Mar 1, 2013	8.63	8.99	8.43	8.51
1900	NASDAQ	ATRC	Thu, Feb 28, 2013	8.52	8.95	8.51	8.88
1899	NASDAQ	ATRC	Wed, Feb 27, 2013	8.49	8.91	8.44	8.54
1898	NASDAQ	ATRC	Tue, Feb 26, 2013	8.31	8.60	8.25	8.47
1897	NASDAQ	ATRC	Mon, Feb 25, 2013	8.58	8.65	8.25	8.25
1896	NASDAQ	ATRC	Fri, Feb 22, 2013	8.28	8.57	8.15	8.54
1895	NASDAQ	ATRC	Thu, Feb 21, 2013	8.49	8.63	8.23	8.25
1894	NASDAQ	ATRC	Wed, Feb 20, 2013	8.47	8.71	8.33	8.47
1893	NASDAQ	ATRC	Tue, Feb 19, 2013	8.36	8.74	8.31	8.49
1892	NASDAQ	ATRC	Fri, Feb 15, 2013	8.60	8.66	8.28	8.31
1891	NASDAQ	ATRC	Thu, Feb 14, 2013	8.45	8.66	8.44	8.54
1890	NASDAQ	ATRC	Wed, Feb 13, 2013	8.26	8.77	8.25	8.50
1889	NASDAQ	ATRC	Tue, Feb 12, 2013	8.18	8.24	8.10	8.24
1888	NASDAQ	ATRC	Mon, Feb 11, 2013	8.05	8.20	8.04	8.16
1887	NASDAQ	ATRC	Fri, Feb 8, 2013	8.03	8.06	7.93	8.06
1886	NASDAQ	ATRC	Thu, Feb 7, 2013	8.10	8.13	7.90	8.00
1885	NASDAQ	ATRC	Wed, Feb 6, 2013	7.88	8.08	7.81	8.08
1884	NASDAQ	ATRC	Tue, Feb 5, 2013	7.79	8.04	7.79	7.89
1883	NASDAQ	ATRC	Mon, Feb 4, 2013	7.98	8.06	7.68	7.79
1882	NASDAQ	ATRC	Fri, Feb 1, 2013	8.11	8.20	7.93	8.03
1881	NASDAQ	ATRC	Thu, Jan 31, 2013	8.24	8.24	8.00	8.06
1880	NASDAQ	ATRC	Wed, Jan 30, 2013	8.04	8.36	8.02	8.20
1879	NASDAQ	ATRC	Tue, Jan 29, 2013	7.63	8.12	7.60	8.07
1878	NASDAQ	ATRC	Mon, Jan 28, 2013	7.60	7.78	7.60	7.66
1877	NASDAQ	ATRC	Fri, Jan 25, 2013	7.53	7.64	7.46	7.62
1876	NASDAQ	ATRC	Thu, Jan 24, 2013	7.64	7.76	7.39	7.51
1875	NASDAQ	ATRC	Wed, Jan 23, 2013	7.92	7.92	7.62	7.65
1874	NASDAQ	ATRC	Tue, Jan 22, 2013	7.92	7.92	7.81	7.90
1873	NASDAQ	ATRC	Fri, Jan 18, 2013	7.82	7.99	7.74	7.90
1872	NASDAQ	ATRC	Thu, Jan 17, 2013	7.91	7.98	7.81	7.86
1871	NASDAQ	ATRC	Wed, Jan 16, 2013	7.60	8.03	7.56	8.01
1870	NASDAQ	ATRC	Tue, Jan 15, 2013	7.41	7.57	7.41	7.49
1869	NASDAQ	ATRC	Mon, Jan 14, 2013	7.64	7.64	7.42	7.46
1868	NASDAQ	ATRC	Fri, Jan 11, 2013	7.99	7.99	7.63	7.68
1867	NASDAQ	ATRC	Thu, Jan 10, 2013	7.97	8.05	7.90	7.96
1866	NASDAQ	ATRC	Wed, Jan 9, 2013	7.84	8.00	7.64	7.95
1865	NASDAQ	ATRC	Tue, Jan 8, 2013	7.58	7.85	7.41	7.80
1864	NASDAQ	ATRC	Mon, Jan 7, 2013	7.45	7.59	7.25	7.56
1863	NASDAQ	ATRC	Fri, Jan 4, 2013	7.37	7.49	7.21	7.46
1862	NASDAQ	ATRC	Thu, Jan 3, 2013	7.17	7.39	7.04	7.32
1861	NASDAQ	ATRC	Wed, Jan 2, 2013	6.94	7.19	6.87	7.14
1860	NASDAQ	ATRC	Mon, Dec 31, 2012	6.64	6.91	6.64	6.90
1859	NASDAQ	ATRC	Fri, Dec 28, 2012	6.69	6.80	6.64	6.65
1858	NASDAQ	ATRC	Thu, Dec 27, 2012	6.76	6.83	6.69	6.73
1857	NASDAQ	ATRC	Wed, Dec 26, 2012	6.76	6.83	6.58	6.78
1856	NASDAQ	ATRC	Mon, Dec 24, 2012	6.84	6.85	6.75	6.75
1855	NASDAQ	ATRC	Fri, Dec 21, 2012	6.76	6.88	6.69	6.81
1854	NASDAQ	ATRC	Thu, Dec 20, 2012	6.71	6.81	6.51	6.80
1853	NASDAQ	ATRC	Wed, Dec 19, 2012	6.58	6.75	6.37	6.69
1852	NASDAQ	ATRC	Tue, Dec 18, 2012	6.55	6.75	6.55	6.72
1851	NASDAQ	ATRC	Mon, Dec 17, 2012	6.34	6.60	6.34	6.57
1850	NASDAQ	ATRC	Fri, Dec 14, 2012	6.36	6.36	6.19	6.31
1849	NASDAQ	ATRC	Thu, Dec 13, 2012	6.11	6.46	6.11	6.39
1848	NASDAQ	ATRC	Wed, Dec 12, 2012	6.15	6.16	6.06	6.15
1847	NASDAQ	ATRC	Tue, Dec 11, 2012	6.14	6.15	6.02	6.15
1846	NASDAQ	ATRC	Mon, Dec 10, 2012	6.19	6.25	6.00	6.09
1845	NASDAQ	ATRC	Fri, Dec 7, 2012	6.20	6.20	6.08	6.16
1844	NASDAQ	ATRC	Thu, Dec 6, 2012	6.35	6.37	6.12	6.18
1843	NASDAQ	ATRC	Wed, Dec 5, 2012	6.46	6.46	6.26	6.33
1842	NASDAQ	ATRC	Tue, Dec 4, 2012	6.55	6.60	6.37	6.45
1841	NASDAQ	ATRC	Mon, Dec 3, 2012	6.85	6.87	6.52	6.53
1840	NASDAQ	ATRC	Fri, Nov 30, 2012	6.77	6.95	6.65	6.75
1839	NASDAQ	ATRC	Thu, Nov 29, 2012	6.83	6.90	6.59	6.74
1838	NASDAQ	ATRC	Wed, Nov 28, 2012	6.76	6.85	6.57	6.80
1837	NASDAQ	ATRC	Tue, Nov 27, 2012	7.00	7.01	6.73	6.76
1836	NASDAQ	ATRC	Mon, Nov 26, 2012	7.11	7.26	7.10	7.14
1835	NASDAQ	ATRC	Fri, Nov 23, 2012	7.18	7.19	7.04	7.10
1834	NASDAQ	ATRC	Wed, Nov 21, 2012	7.20	7.20	7.02	7.08
1833	NASDAQ	ATRC	Tue, Nov 20, 2012	7.20	7.25	7.11	7.18
1832	NASDAQ	ATRC	Mon, Nov 19, 2012	6.82	7.25	6.56	7.23
1831	NASDAQ	ATRC	Fri, Nov 16, 2012	6.56	7.14	6.50	6.75
1830	NASDAQ	ATRC	Thu, Nov 15, 2012	6.60	7.50	6.41	6.43
1829	NASDAQ	ATRC	Wed, Nov 14, 2012	6.80	6.83	6.61	6.62
1828	NASDAQ	ATRC	Tue, Nov 13, 2012	7.10	7.10	6.73	6.78
1827	NASDAQ	ATRC	Mon, Nov 12, 2012	7.20	7.26	7.09	7.09
1826	NASDAQ	ATRC	Fri, Nov 9, 2012	6.65	7.25	6.65	7.21
1825	NASDAQ	ATRC	Thu, Nov 8, 2012	6.96	7.02	6.70	6.70
1824	NASDAQ	ATRC	Wed, Nov 7, 2012	7.24	7.38	6.77	6.96
1823	NASDAQ	ATRC	Tue, Nov 6, 2012	7.18	7.37	7.08	7.28
1822	NASDAQ	ATRC	Mon, Nov 5, 2012	6.54	7.29	6.42	7.11
1821	NASDAQ	ATRC	Fri, Nov 2, 2012	5.95	6.70	5.95	6.56
1820	NASDAQ	ATRC	Thu, Nov 1, 2012	6.30	6.63	5.90	5.91
1819	NASDAQ	ATRC	Wed, Oct 31, 2012	6.34	6.50	6.30	6.42
1818	NASDAQ	ATRC	Fri, Oct 26, 2012	6.29	6.41	6.20	6.30
1817	NASDAQ	ATRC	Thu, Oct 25, 2012	6.57	6.63	6.25	6.27
1816	NASDAQ	ATRC	Wed, Oct 24, 2012	6.91	6.95	6.44	6.54
1815	NASDAQ	ATRC	Tue, Oct 23, 2012	7.11	7.12	6.87	6.88
1814	NASDAQ	ATRC	Mon, Oct 22, 2012	7.11	7.18	7.06	7.16
1813	NASDAQ	ATRC	Fri, Oct 19, 2012	7.07	7.19	7.06	7.15
1812	NASDAQ	ATRC	Thu, Oct 18, 2012	7.22	7.22	7.10	7.14
1811	NASDAQ	ATRC	Wed, Oct 17, 2012	7.28	7.29	7.09	7.25
1810	NASDAQ	ATRC	Tue, Oct 16, 2012	7.35	7.43	7.27	7.30
1809	NASDAQ	ATRC	Mon, Oct 15, 2012	7.48	7.48	7.27	7.29
1808	NASDAQ	ATRC	Fri, Oct 12, 2012	7.28	7.57	7.25	7.48
1807	NASDAQ	ATRC	Thu, Oct 11, 2012	7.31	7.41	7.25	7.31
1806	NASDAQ	ATRC	Wed, Oct 10, 2012	7.27	7.32	7.13	7.28
1805	NASDAQ	ATRC	Tue, Oct 9, 2012	7.24	7.27	7.13	7.24
1804	NASDAQ	ATRC	Mon, Oct 8, 2012	7.28	7.29	7.21	7.25
1803	NASDAQ	ATRC	Fri, Oct 5, 2012	7.27	7.40	7.24	7.33
1802	NASDAQ	ATRC	Thu, Oct 4, 2012	7.32	7.32	7.06	7.27
1801	NASDAQ	ATRC	Wed, Oct 3, 2012	7.48	7.48	6.94	7.27
1800	NASDAQ	ATRC	Tue, Oct 2, 2012	7.63	7.67	7.43	7.65
1799	NASDAQ	ATRC	Mon, Oct 1, 2012	7.52	7.70	7.50	7.61
1798	NASDAQ	ATRC	Fri, Sep 28, 2012	7.60	7.62	7.38	7.44
1797	NASDAQ	ATRC	Thu, Sep 27, 2012	7.73	7.75	7.52	7.65
1796	NASDAQ	ATRC	Wed, Sep 26, 2012	7.81	7.91	7.52	7.64
1795	NASDAQ	ATRC	Tue, Sep 25, 2012	7.98	8.00	7.71	7.76
1794	NASDAQ	ATRC	Mon, Sep 24, 2012	7.94	8.14	7.87	7.90
1793	NASDAQ	ATRC	Fri, Sep 21, 2012	7.88	8.09	7.79	7.99
1792	NASDAQ	ATRC	Thu, Sep 20, 2012	7.55	7.83	7.55	7.78
1791	NASDAQ	ATRC	Wed, Sep 19, 2012	7.71	7.76	7.20	7.58
1790	NASDAQ	ATRC	Tue, Sep 18, 2012	7.63	7.76	7.57	7.72
1789	NASDAQ	ATRC	Mon, Sep 17, 2012	7.58	7.77	7.54	7.62
1788	NASDAQ	ATRC	Fri, Sep 14, 2012	7.67	7.75	7.30	7.60
1787	NASDAQ	ATRC	Thu, Sep 13, 2012	7.15	7.92	7.15	7.67
1786	NASDAQ	ATRC	Wed, Sep 12, 2012	7.13	7.20	7.00	7.07
1785	NASDAQ	ATRC	Tue, Sep 11, 2012	7.14	7.20	7.07	7.13
1784	NASDAQ	ATRC	Mon, Sep 10, 2012	6.82	7.18	6.82	7.09
1783	NASDAQ	ATRC	Fri, Sep 7, 2012	6.83	7.19	6.79	6.80
1782	NASDAQ	ATRC	Thu, Sep 6, 2012	6.75	6.85	6.49	6.77
1781	NASDAQ	ATRC	Wed, Sep 5, 2012	7.00	7.09	6.81	6.83
1780	NASDAQ	ATRC	Tue, Sep 4, 2012	6.96	7.06	6.74	7.02
1779	NASDAQ	ATRC	Fri, Aug 31, 2012	6.91	7.02	6.80	6.98
1778	NASDAQ	ATRC	Thu, Aug 30, 2012	7.02	7.02	6.71	6.84
1777	NASDAQ	ATRC	Wed, Aug 29, 2012	6.66	7.04	6.66	7.04
1776	NASDAQ	ATRC	Tue, Aug 28, 2012	6.61	6.64	6.45	6.64
1775	NASDAQ	ATRC	Mon, Aug 27, 2012	6.58	6.70	6.50	6.54
1774	NASDAQ	ATRC	Fri, Aug 24, 2012	6.58	6.69	6.46	6.65
1773	NASDAQ	ATRC	Thu, Aug 23, 2012	6.70	6.71	6.50	6.58
1772	NASDAQ	ATRC	Wed, Aug 22, 2012	6.88	6.88	6.58	6.73
1771	NASDAQ	ATRC	Tue, Aug 21, 2012	7.38	7.43	6.85	6.90
1770	NASDAQ	ATRC	Mon, Aug 20, 2012	7.19	7.39	7.09	7.33
1769	NASDAQ	ATRC	Fri, Aug 17, 2012	6.88	7.22	6.75	7.20
1768	NASDAQ	ATRC	Thu, Aug 16, 2012	7.00	7.09	6.71	6.92
1767	NASDAQ	ATRC	Wed, Aug 15, 2012	7.28	7.35	7.07	7.12
1766	NASDAQ	ATRC	Tue, Aug 14, 2012	7.80	7.89	7.25	7.31
1765	NASDAQ	ATRC	Mon, Aug 13, 2012	7.62	7.74	7.58	7.69
1764	NASDAQ	ATRC	Fri, Aug 10, 2012	7.60	7.68	7.59	7.65
1763	NASDAQ	ATRC	Thu, Aug 9, 2012	7.65	7.72	7.51	7.64
1762	NASDAQ	ATRC	Wed, Aug 8, 2012	7.66	7.86	7.61	7.64
1761	NASDAQ	ATRC	Tue, Aug 7, 2012	7.53	8.07	7.50	7.72
1760	NASDAQ	ATRC	Mon, Aug 6, 2012	7.64	7.84	7.50	7.56
1759	NASDAQ	ATRC	Fri, Aug 3, 2012	6.78	7.69	6.35	7.62
1758	NASDAQ	ATRC	Thu, Aug 2, 2012	8.00	8.41	8.00	8.10
1757	NASDAQ	ATRC	Wed, Aug 1, 2012	8.39	8.45	8.04	8.04
1756	NASDAQ	ATRC	Tue, Jul 31, 2012	8.41	8.55	8.33	8.37
1755	NASDAQ	ATRC	Mon, Jul 30, 2012	8.81	8.93	8.43	8.43
1754	NASDAQ	ATRC	Fri, Jul 27, 2012	8.40	8.93	8.40	8.82
1753	NASDAQ	ATRC	Thu, Jul 26, 2012	8.55	8.65	8.23	8.38
1752	NASDAQ	ATRC	Wed, Jul 25, 2012	8.41	8.51	8.31	8.41
1751	NASDAQ	ATRC	Tue, Jul 24, 2012	8.70	8.70	8.22	8.33
1750	NASDAQ	ATRC	Mon, Jul 23, 2012	8.68	8.96	8.51	8.67
1749	NASDAQ	ATRC	Fri, Jul 20, 2012	9.05	9.23	8.79	8.83
1748	NASDAQ	ATRC	Thu, Jul 19, 2012	9.40	9.40	9.02	9.14
1747	NASDAQ	ATRC	Wed, Jul 18, 2012	9.67	9.73	9.28	9.38
1746	NASDAQ	ATRC	Tue, Jul 17, 2012	9.91	9.98	9.67	9.70
1745	NASDAQ	ATRC	Mon, Jul 16, 2012	9.78	9.97	9.73	9.88
1744	NASDAQ	ATRC	Fri, Jul 13, 2012	9.50	9.85	9.50	9.84
1743	NASDAQ	ATRC	Thu, Jul 12, 2012	9.46	9.54	9.32	9.49
1742	NASDAQ	ATRC	Wed, Jul 11, 2012	9.60	9.74	9.52	9.55
1741	NASDAQ	ATRC	Tue, Jul 10, 2012	9.57	9.89	9.57	9.63
1740	NASDAQ	ATRC	Mon, Jul 9, 2012	9.36	9.53	9.28	9.48
1739	NASDAQ	ATRC	Fri, Jul 6, 2012	9.40	9.47	9.30	9.36
1738	NASDAQ	ATRC	Thu, Jul 5, 2012	9.47	9.57	9.43	9.49
1737	NASDAQ	ATRC	Tue, Jul 3, 2012	9.44	9.55	9.39	9.53
1736	NASDAQ	ATRC	Mon, Jul 2, 2012	9.69	9.69	9.38	9.57
1735	NASDAQ	ATRC	Fri, Jun 29, 2012	9.48	9.61	9.33	9.61
1734	NASDAQ	ATRC	Thu, Jun 28, 2012	9.54	9.61	9.05	9.27
1733	NASDAQ	ATRC	Wed, Jun 27, 2012	9.50	9.95	9.50	9.75
1732	NASDAQ	ATRC	Tue, Jun 26, 2012	9.44	9.53	9.25	9.50
1731	NASDAQ	ATRC	Mon, Jun 25, 2012	9.48	9.60	9.35	9.40
1730	NASDAQ	ATRC	Fri, Jun 22, 2012	9.58	9.67	9.44	9.64
1729	NASDAQ	ATRC	Thu, Jun 21, 2012	9.52	9.57	9.41	9.56
1728	NASDAQ	ATRC	Wed, Jun 20, 2012	9.42	9.69	9.42	9.54
1727	NASDAQ	ATRC	Tue, Jun 19, 2012	9.49	9.63	9.35	9.43
1726	NASDAQ	ATRC	Mon, Jun 18, 2012	9.08	9.60	9.08	9.48
1725	NASDAQ	ATRC	Fri, Jun 15, 2012	9.06	9.23	9.00	9.20
1724	NASDAQ	ATRC	Thu, Jun 14, 2012	9.40	9.40	8.71	9.01
1723	NASDAQ	ATRC	Wed, Jun 13, 2012	9.34	9.69	9.30	9.47
1722	NASDAQ	ATRC	Tue, Jun 12, 2012	9.47	9.47	9.22	9.42
1721	NASDAQ	ATRC	Mon, Jun 11, 2012	9.73	9.73	9.37	9.41
1720	NASDAQ	ATRC	Fri, Jun 8, 2012	9.49	9.74	9.06	9.61
1719	NASDAQ	ATRC	Thu, Jun 7, 2012	9.51	9.71	9.04	9.54
1718	NASDAQ	ATRC	Wed, Jun 6, 2012	9.24	9.66	9.20	9.65
1717	NASDAQ	ATRC	Tue, Jun 5, 2012	9.13	9.24	9.01	9.20
1716	NASDAQ	ATRC	Mon, Jun 4, 2012	8.83	9.22	8.79	9.14
1715	NASDAQ	ATRC	Fri, Jun 1, 2012	8.74	8.95	8.66	8.80
1714	NASDAQ	ATRC	Thu, May 31, 2012	8.98	9.07	8.83	8.99
1713	NASDAQ	ATRC	Wed, May 30, 2012	8.81	9.14	8.61	8.99
1712	NASDAQ	ATRC	Tue, May 29, 2012	9.04	9.04	8.66	8.92
1711	NASDAQ	ATRC	Fri, May 25, 2012	8.41	9.07	8.41	8.99
1710	NASDAQ	ATRC	Thu, May 24, 2012	8.43	8.50	8.22	8.41
1709	NASDAQ	ATRC	Wed, May 23, 2012	8.07	8.53	8.07	8.41
1708	NASDAQ	ATRC	Tue, May 22, 2012	8.45	8.45	8.03	8.20
1707	NASDAQ	ATRC	Mon, May 21, 2012	8.00	8.50	7.99	8.45
1706	NASDAQ	ATRC	Fri, May 18, 2012	8.30	8.32	7.87	7.96
1705	NASDAQ	ATRC	Thu, May 17, 2012	8.26	8.43	8.23	8.34
1704	NASDAQ	ATRC	Wed, May 16, 2012	8.07	8.30	8.07	8.22
1703	NASDAQ	ATRC	Tue, May 15, 2012	8.20	8.30	8.02	8.04
1702	NASDAQ	ATRC	Mon, May 14, 2012	8.40	8.46	8.12	8.21
1701	NASDAQ	ATRC	Fri, May 11, 2012	8.72	8.81	8.45	8.53
1700	NASDAQ	ATRC	Thu, May 10, 2012	9.06	9.09	8.77	8.85
1699	NASDAQ	ATRC	Wed, May 9, 2012	8.89	9.06	8.85	9.00
1698	NASDAQ	ATRC	Tue, May 8, 2012	9.13	9.20	9.00	9.03
1697	NASDAQ	ATRC	Mon, May 7, 2012	9.17	9.35	9.04	9.21
1696	NASDAQ	ATRC	Fri, May 4, 2012	9.72	9.72	9.16	9.18
1695	NASDAQ	ATRC	Thu, May 3, 2012	8.11	9.80	8.11	9.71
1694	NASDAQ	ATRC	Wed, May 2, 2012	8.01	8.38	8.01	8.05
1693	NASDAQ	ATRC	Tue, May 1, 2012	8.20	8.56	8.09	8.13
1692	NASDAQ	ATRC	Mon, Apr 30, 2012	8.43	8.50	8.15	8.20
1691	NASDAQ	ATRC	Fri, Apr 27, 2012	8.49	8.54	8.34	8.50
1690	NASDAQ	ATRC	Thu, Apr 26, 2012	8.56	8.57	8.47	8.50
1689	NASDAQ	ATRC	Wed, Apr 25, 2012	8.22	8.57	8.22	8.55
1688	NASDAQ	ATRC	Tue, Apr 24, 2012	8.19	8.33	8.15	8.23
1687	NASDAQ	ATRC	Mon, Apr 23, 2012	8.15	8.28	8.15	8.18
1686	NASDAQ	ATRC	Fri, Apr 20, 2012	8.26	8.42	8.16	8.25
1685	NASDAQ	ATRC	Thu, Apr 19, 2012	8.54	8.56	8.11	8.14
1684	NASDAQ	ATRC	Wed, Apr 18, 2012	8.65	8.65	8.48	8.49
1683	NASDAQ	ATRC	Tue, Apr 17, 2012	8.63	8.75	8.61	8.68
1682	NASDAQ	ATRC	Mon, Apr 16, 2012	8.61	8.61	8.49	8.57
1681	NASDAQ	ATRC	Fri, Apr 13, 2012	8.69	8.69	8.51	8.58
1680	NASDAQ	ATRC	Thu, Apr 12, 2012	8.56	8.73	8.55	8.66
1679	NASDAQ	ATRC	Wed, Apr 11, 2012	8.48	8.65	8.41	8.51
1678	NASDAQ	ATRC	Tue, Apr 10, 2012	8.45	8.60	8.32	8.36
1677	NASDAQ	ATRC	Mon, Apr 9, 2012	8.73	8.88	8.32	8.37
1676	NASDAQ	ATRC	Thu, Apr 5, 2012	9.00	9.24	8.90	8.91
1675	NASDAQ	ATRC	Wed, Apr 4, 2012	9.20	9.28	8.97	9.02
1674	NASDAQ	ATRC	Tue, Apr 3, 2012	9.81	9.81	9.28	9.28
1673	NASDAQ	ATRC	Mon, Apr 2, 2012	9.85	9.97	9.62	9.85
1672	NASDAQ	ATRC	Fri, Mar 30, 2012	10.22	10.22	9.91	9.95
1671	NASDAQ	ATRC	Thu, Mar 29, 2012	9.74	10.18	9.74	10.05
1670	NASDAQ	ATRC	Wed, Mar 28, 2012	10.25	10.27	9.66	9.84
1669	NASDAQ	ATRC	Tue, Mar 27, 2012	9.92	10.38	9.80	10.24
1668	NASDAQ	ATRC	Mon, Mar 26, 2012	9.80	9.94	9.61	9.90
1667	NASDAQ	ATRC	Fri, Mar 23, 2012	9.10	9.71	8.94	9.65
1666	NASDAQ	ATRC	Thu, Mar 22, 2012	9.57	9.62	8.96	9.10
1665	NASDAQ	ATRC	Wed, Mar 21, 2012	9.70	9.80	9.56	9.64
1664	NASDAQ	ATRC	Tue, Mar 20, 2012	9.99	9.99	9.60	9.64
1663	NASDAQ	ATRC	Mon, Mar 19, 2012	9.66	9.88	9.59	9.79
1662	NASDAQ	ATRC	Fri, Mar 16, 2012	9.94	10.04	9.62	9.65
1661	NASDAQ	ATRC	Thu, Mar 15, 2012	9.63	9.92	9.50	9.90
1660	NASDAQ	ATRC	Wed, Mar 14, 2012	9.85	9.98	9.43	9.53
1659	NASDAQ	ATRC	Tue, Mar 13, 2012	10.16	10.16	9.87	9.91
1658	NASDAQ	ATRC	Mon, Mar 12, 2012	10.40	10.40	10.01	10.04
1657	NASDAQ	ATRC	Fri, Mar 9, 2012	9.87	10.42	9.87	10.40
1656	NASDAQ	ATRC	Thu, Mar 8, 2012	9.94	10.03	9.79	9.85
1655	NASDAQ	ATRC	Wed, Mar 7, 2012	9.83	9.98	9.78	9.88
1654	NASDAQ	ATRC	Tue, Mar 6, 2012	10.07	10.15	9.81	9.82
1653	NASDAQ	ATRC	Mon, Mar 5, 2012	9.73	10.18	9.62	10.17
1652	NASDAQ	ATRC	Fri, Mar 2, 2012	10.30	10.50	9.75	9.78
1651	NASDAQ	ATRC	Thu, Mar 1, 2012	10.26	10.60	10.26	10.32
1650	NASDAQ	ATRC	Wed, Feb 29, 2012	10.75	10.80	10.20	10.20
1649	NASDAQ	ATRC	Tue, Feb 28, 2012	10.68	10.80	10.42	10.71
1648	NASDAQ	ATRC	Mon, Feb 27, 2012	10.28	10.45	10.13	10.35
1647	NASDAQ	ATRC	Fri, Feb 24, 2012	10.57	10.64	10.27	10.27
1646	NASDAQ	ATRC	Thu, Feb 23, 2012	10.00	10.60	9.89	10.57
1645	NASDAQ	ATRC	Wed, Feb 22, 2012	9.84	10.02	9.76	10.00
1644	NASDAQ	ATRC	Tue, Feb 21, 2012	10.02	10.03	9.77	9.83
1643	NASDAQ	ATRC	Fri, Feb 17, 2012	10.14	10.14	9.94	9.95
1642	NASDAQ	ATRC	Thu, Feb 16, 2012	9.95	10.14	9.85	10.08
1641	NASDAQ	ATRC	Wed, Feb 15, 2012	10.37	10.37	9.90	9.92
1640	NASDAQ	ATRC	Tue, Feb 14, 2012	10.81	10.84	10.27	10.37
1639	NASDAQ	ATRC	Mon, Feb 13, 2012	10.87	11.03	10.77	10.84
1638	NASDAQ	ATRC	Fri, Feb 10, 2012	10.91	11.10	10.60	10.75
1637	NASDAQ	ATRC	Thu, Feb 9, 2012	11.28	11.38	10.79	11.05
1636	NASDAQ	ATRC	Wed, Feb 8, 2012	11.53	11.68	11.15	11.24
1635	NASDAQ	ATRC	Tue, Feb 7, 2012	11.80	11.80	11.38	11.50
1634	NASDAQ	ATRC	Mon, Feb 6, 2012	11.92	11.95	11.56	11.76
1633	NASDAQ	ATRC	Fri, Feb 3, 2012	12.11	12.12	11.80	11.96
1632	NASDAQ	ATRC	Thu, Feb 2, 2012	11.39	11.93	11.28	11.90
1631	NASDAQ	ATRC	Wed, Feb 1, 2012	11.65	11.65	11.15	11.38
1630	NASDAQ	ATRC	Tue, Jan 31, 2012	11.70	11.94	11.45	11.52
1629	NASDAQ	ATRC	Mon, Jan 30, 2012	11.76	12.13	11.51	11.59
1628	NASDAQ	ATRC	Fri, Jan 27, 2012	11.49	11.96	11.40	11.87
1627	NASDAQ	ATRC	Thu, Jan 26, 2012	11.42	11.50	11.30	11.49
1626	NASDAQ	ATRC	Wed, Jan 25, 2012	11.37	11.45	11.26	11.29
1625	NASDAQ	ATRC	Tue, Jan 24, 2012	10.90	11.37	10.90	11.33
1624	NASDAQ	ATRC	Mon, Jan 23, 2012	11.36	11.42	10.94	10.98
1623	NASDAQ	ATRC	Fri, Jan 20, 2012	11.50	11.59	11.30	11.39
1622	NASDAQ	ATRC	Thu, Jan 19, 2012	11.50	11.61	11.31	11.58
1621	NASDAQ	ATRC	Wed, Jan 18, 2012	11.27	11.45	11.15	11.45
1620	NASDAQ	ATRC	Tue, Jan 17, 2012	11.29	11.37	11.16	11.25
1619	NASDAQ	ATRC	Fri, Jan 13, 2012	11.07	11.31	11.07	11.14
1618	NASDAQ	ATRC	Thu, Jan 12, 2012	11.27	11.35	11.10	11.22
1617	NASDAQ	ATRC	Wed, Jan 11, 2012	11.19	11.40	11.19	11.28
1616	NASDAQ	ATRC	Tue, Jan 10, 2012	11.03	11.32	10.90	11.27
1615	NASDAQ	ATRC	Mon, Jan 9, 2012	11.29	11.31	10.80	10.86
1614	NASDAQ	ATRC	Fri, Jan 6, 2012	11.55	11.65	11.20	11.23
1613	NASDAQ	ATRC	Thu, Jan 5, 2012	11.52	11.61	11.23	11.59
1612	NASDAQ	ATRC	Wed, Jan 4, 2012	11.62	11.80	11.50	11.62
1611	NASDAQ	ATRC	Tue, Jan 3, 2012	11.36	11.78	11.14	11.74
1610	NASDAQ	ATRC	Fri, Dec 30, 2011	11.10	11.27	10.96	11.10
1609	NASDAQ	ATRC	Thu, Dec 29, 2011	11.19	11.35	11.04	11.14
1608	NASDAQ	ATRC	Wed, Dec 28, 2011	11.46	11.61	11.07	11.13
1607	NASDAQ	ATRC	Tue, Dec 27, 2011	11.62	11.62	11.10	11.49
1606	NASDAQ	ATRC	Fri, Dec 23, 2011	11.59	11.72	11.45	11.72
1605	NASDAQ	ATRC	Thu, Dec 22, 2011	11.79	11.80	11.26	11.50
1604	NASDAQ	ATRC	Wed, Dec 21, 2011	11.59	11.80	11.35	11.78
1603	NASDAQ	ATRC	Tue, Dec 20, 2011	11.32	11.65	11.10	11.59
1602	NASDAQ	ATRC	Mon, Dec 19, 2011	10.97	11.30	10.88	11.00
1601	NASDAQ	ATRC	Fri, Dec 16, 2011	10.76	11.60	10.70	10.87
1600	NASDAQ	ATRC	Thu, Dec 15, 2011	10.50	10.65	10.20	10.64
1599	NASDAQ	ATRC	Wed, Dec 14, 2011	9.90	10.46	9.90	10.44
1598	NASDAQ	ATRC	Tue, Dec 13, 2011	9.90	10.08	9.81	10.01
1597	NASDAQ	ATRC	Mon, Dec 12, 2011	10.27	10.28	9.90	9.98
1596	NASDAQ	ATRC	Fri, Dec 9, 2011	10.27	10.54	10.13	10.39
1595	NASDAQ	ATRC	Thu, Dec 8, 2011	10.48	10.55	10.09	10.24
1594	NASDAQ	ATRC	Wed, Dec 7, 2011	10.53	10.80	10.19	10.58
1593	NASDAQ	ATRC	Tue, Dec 6, 2011	10.06	10.68	10.01	10.64
1592	NASDAQ	ATRC	Mon, Dec 5, 2011	9.95	10.13	9.76	10.09
1591	NASDAQ	ATRC	Fri, Dec 2, 2011	9.78	9.99	9.60	9.82
1590	NASDAQ	ATRC	Thu, Dec 1, 2011	10.05	10.05	9.65	9.65
1589	NASDAQ	ATRC	Wed, Nov 30, 2011	9.40	10.15	9.29	10.14
1588	NASDAQ	ATRC	Tue, Nov 29, 2011	9.25	9.35	9.00	9.09
1587	NASDAQ	ATRC	Mon, Nov 28, 2011	8.78	9.53	8.65	9.28
1586	NASDAQ	ATRC	Fri, Nov 25, 2011	8.65	8.91	8.54	8.54
1585	NASDAQ	ATRC	Wed, Nov 23, 2011	9.35	9.49	8.69	8.69
1584	NASDAQ	ATRC	Tue, Nov 22, 2011	9.49	9.66	9.40	9.41
1583	NASDAQ	ATRC	Mon, Nov 21, 2011	9.95	10.11	9.42	9.46
1582	NASDAQ	ATRC	Fri, Nov 18, 2011	10.00	10.15	10.00	10.07
1581	NASDAQ	ATRC	Thu, Nov 17, 2011	10.06	10.16	9.94	9.99
1580	NASDAQ	ATRC	Wed, Nov 16, 2011	9.92	10.44	9.88	10.01
1579	NASDAQ	ATRC	Tue, Nov 15, 2011	9.83	10.03	9.76	10.02
1578	NASDAQ	ATRC	Mon, Nov 14, 2011	10.02	10.06	9.83	9.87
1577	NASDAQ	ATRC	Fri, Nov 11, 2011	9.84	10.12	9.74	10.09
1576	NASDAQ	ATRC	Thu, Nov 10, 2011	10.01	10.18	9.75	9.80
1575	NASDAQ	ATRC	Wed, Nov 9, 2011	10.29	10.56	9.82	9.84
1574	NASDAQ	ATRC	Tue, Nov 8, 2011	10.14	10.65	10.03	10.62
1573	NASDAQ	ATRC	Mon, Nov 7, 2011	10.11	10.26	9.92	10.02
1572	NASDAQ	ATRC	Fri, Nov 4, 2011	10.48	10.48	10.07	10.10
1571	NASDAQ	ATRC	Thu, Nov 3, 2011	10.88	10.88	10.32	10.55
1570	NASDAQ	ATRC	Wed, Nov 2, 2011	10.61	10.86	10.36	10.78
1569	NASDAQ	ATRC	Tue, Nov 1, 2011	10.78	11.16	10.27	10.35
1568	NASDAQ	ATRC	Mon, Oct 31, 2011	11.80	11.81	11.13	11.16
1567	NASDAQ	ATRC	Fri, Oct 28, 2011	12.00	12.06	11.77	11.96
1566	NASDAQ	ATRC	Thu, Oct 27, 2011	11.59	12.42	11.19	12.05
1565	NASDAQ	ATRC	Wed, Oct 26, 2011	10.10	10.16	9.68	10.00
1564	NASDAQ	ATRC	Tue, Oct 25, 2011	10.17	10.17	9.90	9.97
1563	NASDAQ	ATRC	Mon, Oct 24, 2011	11.61	12.17	9.65	10.16
1562	NASDAQ	ATRC	Fri, Oct 21, 2011	12.01	12.09	11.34	11.63
1561	NASDAQ	ATRC	Thu, Oct 20, 2011	11.85	12.06	11.70	12.02
1560	NASDAQ	ATRC	Wed, Oct 19, 2011	12.04	12.10	11.85	11.88
1559	NASDAQ	ATRC	Tue, Oct 18, 2011	11.68	12.15	11.34	12.02
1558	NASDAQ	ATRC	Mon, Oct 17, 2011	12.04	12.17	11.60	11.63
1557	NASDAQ	ATRC	Fri, Oct 14, 2011	11.41	12.24	11.41	12.17
1556	NASDAQ	ATRC	Thu, Oct 13, 2011	11.27	11.40	11.13	11.34
1555	NASDAQ	ATRC	Wed, Oct 12, 2011	10.91	11.49	10.61	11.36
1554	NASDAQ	ATRC	Tue, Oct 11, 2011	10.21	10.88	10.02	10.88
1553	NASDAQ	ATRC	Mon, Oct 10, 2011	10.28	10.34	10.02	10.33
1552	NASDAQ	ATRC	Fri, Oct 7, 2011	10.43	10.43	10.13	10.22
1551	NASDAQ	ATRC	Thu, Oct 6, 2011	10.43	10.55	10.15	10.44
1550	NASDAQ	ATRC	Wed, Oct 5, 2011	9.82	10.74	9.40	10.49
1549	NASDAQ	ATRC	Tue, Oct 4, 2011	9.62	10.00	9.53	9.79
1548	NASDAQ	ATRC	Mon, Oct 3, 2011	9.66	10.28	9.58	9.69
1547	NASDAQ	ATRC	Fri, Sep 30, 2011	10.05	10.09	9.68	9.74
1546	NASDAQ	ATRC	Thu, Sep 29, 2011	10.29	10.33	9.95	10.21
1545	NASDAQ	ATRC	Wed, Sep 28, 2011	10.64	10.64	10.05	10.05
1544	NASDAQ	ATRC	Tue, Sep 27, 2011	10.52	11.00	10.47	10.59
1543	NASDAQ	ATRC	Mon, Sep 26, 2011	10.28	10.36	10.00	10.31
1542	NASDAQ	ATRC	Fri, Sep 23, 2011	10.23	10.29	10.12	10.25
1541	NASDAQ	ATRC	Thu, Sep 22, 2011	9.76	10.60	9.76	10.25
1540	NASDAQ	ATRC	Wed, Sep 21, 2011	10.53	10.89	9.75	9.80
1539	NASDAQ	ATRC	Tue, Sep 20, 2011	10.82	10.94	10.55	10.55
1538	NASDAQ	ATRC	Mon, Sep 19, 2011	10.27	11.00	9.60	10.79
1537	NASDAQ	ATRC	Fri, Sep 16, 2011	10.26	10.47	10.15	10.42
1536	NASDAQ	ATRC	Thu, Sep 15, 2011	10.50	10.64	10.08	10.18
1535	NASDAQ	ATRC	Wed, Sep 14, 2011	9.74	10.55	9.74	10.44
1534	NASDAQ	ATRC	Tue, Sep 13, 2011	9.75	9.84	9.40	9.66
1533	NASDAQ	ATRC	Mon, Sep 12, 2011	9.79	10.19	9.55	9.64
1532	NASDAQ	ATRC	Fri, Sep 9, 2011	9.93	10.04	9.76	9.83
1531	NASDAQ	ATRC	Thu, Sep 8, 2011	10.09	10.65	9.95	9.98
1530	NASDAQ	ATRC	Wed, Sep 7, 2011	9.59	10.44	9.59	10.09
1529	NASDAQ	ATRC	Tue, Sep 6, 2011	9.17	9.61	9.17	9.47
1528	NASDAQ	ATRC	Fri, Sep 2, 2011	9.76	9.86	9.41	9.41
1527	NASDAQ	ATRC	Thu, Sep 1, 2011	10.28	10.42	9.40	9.93
1526	NASDAQ	ATRC	Wed, Aug 31, 2011	10.16	10.30	9.79	10.26
1525	NASDAQ	ATRC	Tue, Aug 30, 2011	10.27	10.27	10.02	10.11
1524	NASDAQ	ATRC	Mon, Aug 29, 2011	10.29	10.39	10.13	10.37
1523	NASDAQ	ATRC	Fri, Aug 26, 2011	9.99	10.29	9.87	10.14
1522	NASDAQ	ATRC	Thu, Aug 25, 2011	10.97	10.97	10.00	10.07
1521	NASDAQ	ATRC	Wed, Aug 24, 2011	10.99	11.46	10.63	10.90
1520	NASDAQ	ATRC	Tue, Aug 23, 2011	10.00	10.84	10.00	10.82
1519	NASDAQ	ATRC	Mon, Aug 22, 2011	10.52	10.52	9.91	10.01
1518	NASDAQ	ATRC	Fri, Aug 19, 2011	10.00	10.51	10.00	10.27
1517	NASDAQ	ATRC	Thu, Aug 18, 2011	10.32	10.47	9.90	10.06
1516	NASDAQ	ATRC	Wed, Aug 17, 2011	10.83	11.22	10.41	10.53
1515	NASDAQ	ATRC	Tue, Aug 16, 2011	10.39	11.25	10.20	10.81
1514	NASDAQ	ATRC	Mon, Aug 15, 2011	9.73	10.54	9.73	10.51
1513	NASDAQ	ATRC	Fri, Aug 12, 2011	9.10	9.69	9.06	9.65
1512	NASDAQ	ATRC	Thu, Aug 11, 2011	9.10	9.16	8.83	9.05
1511	NASDAQ	ATRC	Wed, Aug 10, 2011	9.60	9.70	8.97	9.09
1510	NASDAQ	ATRC	Tue, Aug 9, 2011	9.72	11.20	8.98	9.81
1509	NASDAQ	ATRC	Mon, Aug 8, 2011	10.54	10.69	9.51	9.51
1508	NASDAQ	ATRC	Fri, Aug 5, 2011	11.00	11.23	10.45	10.77
1507	NASDAQ	ATRC	Thu, Aug 4, 2011	11.53	11.73	10.96	10.96
1506	NASDAQ	ATRC	Wed, Aug 3, 2011	11.73	11.84	11.25	11.59
1505	NASDAQ	ATRC	Tue, Aug 2, 2011	11.72	12.17	11.64	11.67
1504	NASDAQ	ATRC	Mon, Aug 1, 2011	12.21	12.21	11.71	11.81
1503	NASDAQ	ATRC	Fri, Jul 29, 2011	11.57	12.17	11.57	12.17
1502	NASDAQ	ATRC	Thu, Jul 28, 2011	12.22	12.22	11.70	11.97
1501	NASDAQ	ATRC	Wed, Jul 27, 2011	13.06	13.15	12.02	12.22
1500	NASDAQ	ATRC	Tue, Jul 26, 2011	13.46	13.53	12.94	13.12
1499	NASDAQ	ATRC	Mon, Jul 25, 2011	13.41	13.97	12.72	13.48
1498	NASDAQ	ATRC	Fri, Jul 22, 2011	13.70	13.79	13.34	13.45
1497	NASDAQ	ATRC	Thu, Jul 21, 2011	13.58	13.73	13.41	13.68
1496	NASDAQ	ATRC	Wed, Jul 20, 2011	13.58	13.65	13.07	13.49
1495	NASDAQ	ATRC	Tue, Jul 19, 2011	13.70	13.96	13.45	13.81
1494	NASDAQ	ATRC	Mon, Jul 18, 2011	13.60	13.79	12.99	13.67
1493	NASDAQ	ATRC	Fri, Jul 15, 2011	13.52	13.85	13.52	13.62
1492	NASDAQ	ATRC	Thu, Jul 14, 2011	13.82	13.97	13.33	13.46
1491	NASDAQ	ATRC	Wed, Jul 13, 2011	13.87	14.00	13.78	13.86
1490	NASDAQ	ATRC	Tue, Jul 12, 2011	14.18	14.40	13.77	13.83
1489	NASDAQ	ATRC	Mon, Jul 11, 2011	14.41	14.51	14.14	14.18
1488	NASDAQ	ATRC	Fri, Jul 8, 2011	14.19	14.50	14.15	14.44
1487	NASDAQ	ATRC	Thu, Jul 7, 2011	13.85	14.50	13.68	14.40
1486	NASDAQ	ATRC	Wed, Jul 6, 2011	13.32	13.83	12.88	13.76
1485	NASDAQ	ATRC	Tue, Jul 5, 2011	12.99	13.51	12.99	13.38
1484	NASDAQ	ATRC	Fri, Jul 1, 2011	12.78	13.07	12.53	12.96
1483	NASDAQ	ATRC	Thu, Jun 30, 2011	12.89	13.13	12.79	12.90
1482	NASDAQ	ATRC	Wed, Jun 29, 2011	13.38	13.45	12.86	12.92
1481	NASDAQ	ATRC	Tue, Jun 28, 2011	12.78	13.56	12.67	13.33
1480	NASDAQ	ATRC	Mon, Jun 27, 2011	12.47	13.03	12.29	12.82
1479	NASDAQ	ATRC	Fri, Jun 24, 2011	12.16	12.72	11.93	12.40
1478	NASDAQ	ATRC	Thu, Jun 23, 2011	12.27	12.31	11.77	12.14
1477	NASDAQ	ATRC	Wed, Jun 22, 2011	12.43	12.92	12.16	12.35
1476	NASDAQ	ATRC	Tue, Jun 21, 2011	12.51	12.81	12.36	12.48
1475	NASDAQ	ATRC	Mon, Jun 20, 2011	12.55	12.74	12.08	12.60
1474	NASDAQ	ATRC	Fri, Jun 17, 2011	13.26	13.34	12.50	12.66
1473	NASDAQ	ATRC	Thu, Jun 16, 2011	13.43	13.47	12.85	13.23
1472	NASDAQ	ATRC	Wed, Jun 15, 2011	13.49	13.74	13.30	13.48
1471	NASDAQ	ATRC	Tue, Jun 14, 2011	14.49	14.49	13.45	13.66
1470	NASDAQ	ATRC	Mon, Jun 13, 2011	14.00	14.50	13.76	14.49
1469	NASDAQ	ATRC	Fri, Jun 10, 2011	14.41	14.41	12.89	13.99
1468	NASDAQ	ATRC	Thu, Jun 9, 2011	14.50	14.50	14.17	14.40
1467	NASDAQ	ATRC	Wed, Jun 8, 2011	14.49	14.84	13.21	14.50
1466	NASDAQ	ATRC	Tue, Jun 7, 2011	14.50	14.50	14.21	14.48
1465	NASDAQ	ATRC	Mon, Jun 6, 2011	14.36	14.50	14.15	14.42
1464	NASDAQ	ATRC	Fri, Jun 3, 2011	13.99	14.46	13.99	14.37
1463	NASDAQ	ATRC	Thu, Jun 2, 2011	14.24	14.50	14.18	14.50
1462	NASDAQ	ATRC	Wed, Jun 1, 2011	14.21	14.37	14.14	14.21
1461	NASDAQ	ATRC	Tue, May 31, 2011	14.29	14.33	14.11	14.22
1460	NASDAQ	ATRC	Fri, May 27, 2011	14.32	14.32	14.20	14.24
1459	NASDAQ	ATRC	Thu, May 26, 2011	14.23	14.38	14.18	14.29
1458	NASDAQ	ATRC	Wed, May 25, 2011	14.00	14.30	13.77	14.28
1457	NASDAQ	ATRC	Tue, May 24, 2011	13.82	14.20	13.65	14.00
1456	NASDAQ	ATRC	Mon, May 23, 2011	13.52	14.00	13.00	13.81
1455	NASDAQ	ATRC	Fri, May 20, 2011	13.99	14.18	13.55	13.68
1454	NASDAQ	ATRC	Thu, May 19, 2011	14.18	14.23	13.76	13.97
1453	NASDAQ	ATRC	Wed, May 18, 2011	14.43	14.54	14.11	14.17
1452	NASDAQ	ATRC	Tue, May 17, 2011	14.00	14.43	14.00	14.37
1451	NASDAQ	ATRC	Mon, May 16, 2011	13.73	14.24	13.67	14.05
1450	NASDAQ	ATRC	Fri, May 13, 2011	13.69	13.69	13.50	13.63
1449	NASDAQ	ATRC	Thu, May 12, 2011	13.51	13.75	13.32	13.70
1448	NASDAQ	ATRC	Wed, May 11, 2011	13.60	13.60	13.40	13.51
1447	NASDAQ	ATRC	Tue, May 10, 2011	13.60	13.61	13.48	13.61
1446	NASDAQ	ATRC	Mon, May 9, 2011	13.60	13.60	13.29	13.59
1445	NASDAQ	ATRC	Fri, May 6, 2011	13.37	13.59	13.30	13.58
1444	NASDAQ	ATRC	Thu, May 5, 2011	12.25	13.55	12.25	13.34
1443	NASDAQ	ATRC	Wed, May 4, 2011	11.81	12.39	11.50	12.36
1442	NASDAQ	ATRC	Tue, May 3, 2011	13.49	13.59	12.71	12.93
1441	NASDAQ	ATRC	Mon, May 2, 2011	13.58	13.60	13.45	13.50
1440	NASDAQ	ATRC	Fri, Apr 29, 2011	13.25	13.54	13.14	13.53
1439	NASDAQ	ATRC	Thu, Apr 28, 2011	13.25	13.30	13.06	13.28
1438	NASDAQ	ATRC	Wed, Apr 27, 2011	12.90	13.46	12.84	13.43
1437	NASDAQ	ATRC	Tue, Apr 26, 2011	12.80	12.93	12.77	12.86
1436	NASDAQ	ATRC	Mon, Apr 25, 2011	12.63	12.61	12.27	12.56
1435	NASDAQ	ATRC	Thu, Apr 21, 2011	12.54	12.73	12.54	12.67
1434	NASDAQ	ATRC	Wed, Apr 20, 2011	12.41	12.63	12.10	12.50
1433	NASDAQ	ATRC	Tue, Apr 19, 2011	12.89	13.06	12.17	12.25
1432	NASDAQ	ATRC	Mon, Apr 18, 2011	13.32	13.38	12.79	12.80
1431	NASDAQ	ATRC	Fri, Apr 15, 2011	13.58	13.75	12.88	13.45
1430	NASDAQ	ATRC	Thu, Apr 14, 2011	12.94	13.63	12.94	13.53
1429	NASDAQ	ATRC	Wed, Apr 13, 2011	12.78	12.96	12.36	12.93
1428	NASDAQ	ATRC	Tue, Apr 12, 2011	12.51	13.32	12.16	12.70
1427	NASDAQ	ATRC	Mon, Apr 11, 2011	12.69	13.20	12.58	12.73
1426	NASDAQ	ATRC	Fri, Apr 8, 2011	12.48	12.54	12.14	12.52
1425	NASDAQ	ATRC	Thu, Apr 7, 2011	11.94	12.50	11.91	12.43
1424	NASDAQ	ATRC	Wed, Apr 6, 2011	11.79	11.95	11.70	11.92
1423	NASDAQ	ATRC	Tue, Apr 5, 2011	11.66	11.74	11.48	11.70
1422	NASDAQ	ATRC	Mon, Apr 4, 2011	11.67	11.67	11.49	11.61
1421	NASDAQ	ATRC	Fri, Apr 1, 2011	11.43	11.69	11.33	11.58
1420	NASDAQ	ATRC	Thu, Mar 31, 2011	11.16	11.48	10.56	11.38
1419	NASDAQ	ATRC	Wed, Mar 30, 2011	11.14	11.35	11.14	11.29
1418	NASDAQ	ATRC	Tue, Mar 29, 2011	11.14	11.30	11.10	11.21
1417	NASDAQ	ATRC	Mon, Mar 28, 2011	11.02	11.22	10.92	11.15
1416	NASDAQ	ATRC	Fri, Mar 25, 2011	11.01	11.06	10.92	11.04
1415	NASDAQ	ATRC	Thu, Mar 24, 2011	10.88	11.03	10.81	11.03
1414	NASDAQ	ATRC	Wed, Mar 23, 2011	10.77	10.77	10.61	10.76
1413	NASDAQ	ATRC	Tue, Mar 22, 2011	10.67	10.81	10.62	10.78
1412	NASDAQ	ATRC	Mon, Mar 21, 2011	10.44	10.91	10.32	10.71
1411	NASDAQ	ATRC	Fri, Mar 18, 2011	9.96	10.32	9.92	10.24
1410	NASDAQ	ATRC	Thu, Mar 17, 2011	9.97	9.99	9.82	9.94
1409	NASDAQ	ATRC	Wed, Mar 16, 2011	9.77	9.84	9.67	9.84
1408	NASDAQ	ATRC	Tue, Mar 15, 2011	9.50	9.77	9.15	9.75
1407	NASDAQ	ATRC	Mon, Mar 14, 2011	9.63	9.65	9.55	9.64
1406	NASDAQ	ATRC	Fri, Mar 11, 2011	9.61	9.82	9.61	9.65
1405	NASDAQ	ATRC	Thu, Mar 10, 2011	9.65	9.65	9.23	9.62
1404	NASDAQ	ATRC	Wed, Mar 9, 2011	10.04	10.04	9.79	9.85
1403	NASDAQ	ATRC	Tue, Mar 8, 2011	10.10	10.18	9.84	10.10
1402	NASDAQ	ATRC	Mon, Mar 7, 2011	10.06	10.12	10.00	10.06
1401	NASDAQ	ATRC	Fri, Mar 4, 2011	10.28	10.28	10.01	10.01
1400	NASDAQ	ATRC	Thu, Mar 3, 2011	10.19	10.32	10.10	10.25
1399	NASDAQ	ATRC	Wed, Mar 2, 2011	10.05	10.15	10.05	10.10
1398	NASDAQ	ATRC	Tue, Mar 1, 2011	10.03	10.14	10.01	10.10
1397	NASDAQ	ATRC	Mon, Feb 28, 2011	10.03	10.13	10.00	10.06
1396	NASDAQ	ATRC	Fri, Feb 25, 2011	10.08	10.13	10.05	10.10
1395	NASDAQ	ATRC	Thu, Feb 24, 2011	10.26	10.26	10.00	10.07
1394	NASDAQ	ATRC	Wed, Feb 23, 2011	11.03	11.03	10.16	10.30
1393	NASDAQ	ATRC	Tue, Feb 22, 2011	11.24	11.24	10.78	10.89
1392	NASDAQ	ATRC	Fri, Feb 18, 2011	11.01	11.50	11.01	11.27
1391	NASDAQ	ATRC	Thu, Feb 17, 2011	11.50	11.60	11.32	11.52
1390	NASDAQ	ATRC	Wed, Feb 16, 2011	11.28	11.79	11.28	11.49
1389	NASDAQ	ATRC	Tue, Feb 15, 2011	11.23	11.28	11.10	11.25
1388	NASDAQ	ATRC	Mon, Feb 14, 2011	11.05	11.30	10.93	11.28
1387	NASDAQ	ATRC	Fri, Feb 11, 2011	11.18	11.30	11.04	11.29
1386	NASDAQ	ATRC	Thu, Feb 10, 2011	11.22	11.29	11.00	11.18
1385	NASDAQ	ATRC	Wed, Feb 9, 2011	11.09	11.22	11.08	11.20
1384	NASDAQ	ATRC	Tue, Feb 8, 2011	10.99	11.15	10.92	11.06
1383	NASDAQ	ATRC	Mon, Feb 7, 2011	10.76	11.00	10.73	10.97
1382	NASDAQ	ATRC	Fri, Feb 4, 2011	10.86	10.89	10.54	10.72
1381	NASDAQ	ATRC	Thu, Feb 3, 2011	11.33	11.33	10.87	10.90
1380	NASDAQ	ATRC	Wed, Feb 2, 2011	11.08	11.24	10.85	11.02
1379	NASDAQ	ATRC	Tue, Feb 1, 2011	10.90	11.12	10.53	10.93
1378	NASDAQ	ATRC	Mon, Jan 31, 2011	10.96	11.05	10.52	11.00
1377	NASDAQ	ATRC	Fri, Jan 28, 2011	10.88	11.14	10.88	11.09
1376	NASDAQ	ATRC	Thu, Jan 27, 2011	11.03	11.18	11.03	11.18
1375	NASDAQ	ATRC	Wed, Jan 26, 2011	11.13	11.22	10.95	11.07
1374	NASDAQ	ATRC	Tue, Jan 25, 2011	10.99	11.14	10.95	11.13
1373	NASDAQ	ATRC	Mon, Jan 24, 2011	10.78	10.99	10.20	10.93
1372	NASDAQ	ATRC	Fri, Jan 21, 2011	10.56	10.78	10.51	10.74
1371	NASDAQ	ATRC	Thu, Jan 20, 2011	10.56	10.60	10.41	10.53
1370	NASDAQ	ATRC	Wed, Jan 19, 2011	10.95	10.95	10.05	10.56
1369	NASDAQ	ATRC	Tue, Jan 18, 2011	11.10	11.12	10.85	10.97
1368	NASDAQ	ATRC	Fri, Jan 14, 2011	11.18	11.21	11.11	11.13
1367	NASDAQ	ATRC	Thu, Jan 13, 2011	11.16	11.22	11.15	11.22
1366	NASDAQ	ATRC	Wed, Jan 12, 2011	11.22	11.22	11.17	11.22
1365	NASDAQ	ATRC	Tue, Jan 11, 2011	11.07	11.22	11.07	11.22
1364	NASDAQ	ATRC	Mon, Jan 10, 2011	11.01	11.10	11.01	11.10
1363	NASDAQ	ATRC	Fri, Jan 7, 2011	10.81	11.10	10.81	11.06
1362	NASDAQ	ATRC	Thu, Jan 6, 2011	10.80	10.86	10.70	10.82
1361	NASDAQ	ATRC	Wed, Jan 5, 2011	10.37	10.80	10.35	10.80
1360	NASDAQ	ATRC	Tue, Jan 4, 2011	10.27	10.79	10.25	10.54
1359	NASDAQ	ATRC	Mon, Jan 3, 2011	10.20	10.27	9.93	10.25
1358	NASDAQ	ATRC	Fri, Dec 31, 2010	10.26	10.27	10.18	10.27
1357	NASDAQ	ATRC	Thu, Dec 30, 2010	10.27	10.27	10.18	10.27
1356	NASDAQ	ATRC	Wed, Dec 29, 2010	10.20	10.27	10.20	10.27
1355	NASDAQ	ATRC	Tue, Dec 28, 2010	10.20	10.27	10.19	10.22
1354	NASDAQ	ATRC	Mon, Dec 27, 2010	10.21	10.27	10.20	10.20
1353	NASDAQ	ATRC	Thu, Dec 23, 2010	10.23	10.27	10.19	10.25
1352	NASDAQ	ATRC	Wed, Dec 22, 2010	10.27	10.27	10.15	10.21
1351	NASDAQ	ATRC	Tue, Dec 21, 2010	10.20	10.30	10.13	10.26
1350	NASDAQ	ATRC	Mon, Dec 20, 2010	9.98	10.33	9.96	10.22
1349	NASDAQ	ATRC	Fri, Dec 17, 2010	9.90	10.11	9.90	10.00
1348	NASDAQ	ATRC	Thu, Dec 16, 2010	10.15	10.15	9.83	9.88
1347	NASDAQ	ATRC	Wed, Dec 15, 2010	9.91	10.07	9.46	10.07
1346	NASDAQ	ATRC	Tue, Dec 14, 2010	9.93	9.96	9.53	9.81
1345	NASDAQ	ATRC	Mon, Dec 13, 2010	9.97	9.97	9.60	9.84
1344	NASDAQ	ATRC	Fri, Dec 10, 2010	10.18	10.18	9.74	9.86
1343	NASDAQ	ATRC	Thu, Dec 9, 2010	10.37	10.37	9.97	10.06
1342	NASDAQ	ATRC	Wed, Dec 8, 2010	9.60	10.41	9.48	10.18
1341	NASDAQ	ATRC	Tue, Dec 7, 2010	9.90	9.90	9.51	9.53
1340	NASDAQ	ATRC	Mon, Dec 6, 2010	9.82	9.92	9.75	9.86
1339	NASDAQ	ATRC	Fri, Dec 3, 2010	9.29	10.08	9.18	10.06
1338	NASDAQ	ATRC	Thu, Dec 2, 2010	9.11	9.35	8.99	9.25
1337	NASDAQ	ATRC	Wed, Dec 1, 2010	8.88	9.35	8.73	9.20
1336	NASDAQ	ATRC	Tue, Nov 30, 2010	8.69	9.00	8.44	8.98
1335	NASDAQ	ATRC	Mon, Nov 29, 2010	8.68	8.89	8.50	8.71
1334	NASDAQ	ATRC	Wed, Nov 24, 2010	8.72	8.95	8.58	8.62
1333	NASDAQ	ATRC	Tue, Nov 23, 2010	8.65	8.90	8.44	8.72
1332	NASDAQ	ATRC	Mon, Nov 22, 2010	8.84	8.84	8.50	8.66
1331	NASDAQ	ATRC	Fri, Nov 19, 2010	8.36	9.00	8.35	8.54
1330	NASDAQ	ATRC	Thu, Nov 18, 2010	8.25	8.47	8.25	8.45
1329	NASDAQ	ATRC	Wed, Nov 17, 2010	8.10	8.31	8.10	8.28
1328	NASDAQ	ATRC	Tue, Nov 16, 2010	8.00	8.10	8.00	8.10
1327	NASDAQ	ATRC	Mon, Nov 15, 2010	8.01	8.09	8.00	8.00
1326	NASDAQ	ATRC	Fri, Nov 12, 2010	8.10	8.11	8.00	8.00
1325	NASDAQ	ATRC	Thu, Nov 11, 2010	8.19	8.19	8.04	8.13
1324	NASDAQ	ATRC	Wed, Nov 10, 2010	8.09	8.14	8.06	8.12
1323	NASDAQ	ATRC	Tue, Nov 9, 2010	7.95	8.29	7.74	8.20
1322	NASDAQ	ATRC	Mon, Nov 8, 2010	8.27	8.27	8.15	8.17
1321	NASDAQ	ATRC	Fri, Nov 5, 2010	8.59	8.59	8.09	8.29
1320	NASDAQ	ATRC	Thu, Nov 4, 2010	8.59	8.60	8.50	8.55
1319	NASDAQ	ATRC	Wed, Nov 3, 2010	8.22	8.59	8.22	8.54
1318	NASDAQ	ATRC	Tue, Nov 2, 2010	8.19	8.24	7.88	8.17
1317	NASDAQ	ATRC	Mon, Nov 1, 2010	8.00	8.19	8.00	8.18
1316	NASDAQ	ATRC	Fri, Oct 29, 2010	7.90	7.92	7.38	7.91
1315	NASDAQ	ATRC	Thu, Oct 28, 2010	7.90	7.92	7.65	7.90
1314	NASDAQ	ATRC	Wed, Oct 27, 2010	8.08	8.09	7.86	7.98
1313	NASDAQ	ATRC	Tue, Oct 26, 2010	7.95	8.00	7.86	8.00
1312	NASDAQ	ATRC	Mon, Oct 25, 2010	7.98	8.09	7.97	8.00
1311	NASDAQ	ATRC	Fri, Oct 22, 2010	7.99	8.04	7.99	7.99
1310	NASDAQ	ATRC	Thu, Oct 21, 2010	7.98	7.99	7.91	7.95
1309	NASDAQ	ATRC	Wed, Oct 20, 2010	8.09	8.18	8.01	8.07
1308	NASDAQ	ATRC	Tue, Oct 19, 2010	8.12	8.14	7.98	8.04
1307	NASDAQ	ATRC	Mon, Oct 18, 2010	8.01	8.18	8.01	8.14
1306	NASDAQ	ATRC	Fri, Oct 15, 2010	7.89	8.04	7.53	8.04
1305	NASDAQ	ATRC	Thu, Oct 14, 2010	8.00	8.00	7.81	7.92
1304	NASDAQ	ATRC	Wed, Oct 13, 2010	8.00	8.00	7.83	7.97
1303	NASDAQ	ATRC	Tue, Oct 12, 2010	8.09	8.13	7.90	7.96
1302	NASDAQ	ATRC	Mon, Oct 11, 2010	8.12	8.18	8.05	8.05
1301	NASDAQ	ATRC	Fri, Oct 8, 2010	8.03	8.14	8.03	8.10
1300	NASDAQ	ATRC	Thu, Oct 7, 2010	8.01	8.19	7.98	8.14
1299	NASDAQ	ATRC	Wed, Oct 6, 2010	8.00	8.09	7.86	7.95
1298	NASDAQ	ATRC	Tue, Oct 5, 2010	7.96	8.00	7.86	7.96
1297	NASDAQ	ATRC	Mon, Oct 4, 2010	7.95	7.98	7.89	7.89
1296	NASDAQ	ATRC	Fri, Oct 1, 2010	7.87	7.96	7.85	7.91
1295	NASDAQ	ATRC	Thu, Sep 30, 2010	7.80	7.90	7.79	7.87
1294	NASDAQ	ATRC	Wed, Sep 29, 2010	7.80	7.90	7.66	7.84
1293	NASDAQ	ATRC	Tue, Sep 28, 2010	7.81	7.89	7.66	7.85
1292	NASDAQ	ATRC	Mon, Sep 27, 2010	7.91	7.96	7.81	7.84
1291	NASDAQ	ATRC	Fri, Sep 24, 2010	8.10	8.10	7.63	7.76
1290	NASDAQ	ATRC	Thu, Sep 23, 2010	8.16	8.19	7.98	8.06
1289	NASDAQ	ATRC	Wed, Sep 22, 2010	8.33	8.33	8.09	8.19
1288	NASDAQ	ATRC	Tue, Sep 21, 2010	8.56	8.59	8.09	8.43
1287	NASDAQ	ATRC	Mon, Sep 20, 2010	8.55	8.60	8.41	8.60
1286	NASDAQ	ATRC	Fri, Sep 17, 2010	8.20	8.64	8.20	8.55
1285	NASDAQ	ATRC	Thu, Sep 16, 2010	7.90	8.17	7.82	8.06
1284	NASDAQ	ATRC	Wed, Sep 15, 2010	7.85	7.89	7.79	7.86
1283	NASDAQ	ATRC	Tue, Sep 14, 2010	7.89	7.90	7.80	7.85
1282	NASDAQ	ATRC	Mon, Sep 13, 2010	7.90	7.90	7.85	7.85
1281	NASDAQ	ATRC	Fri, Sep 10, 2010	7.58	7.92	7.55	7.85
1280	NASDAQ	ATRC	Thu, Sep 9, 2010	7.80	7.90	7.60	7.85
1279	NASDAQ	ATRC	Wed, Sep 8, 2010	7.83	7.84	7.75	7.80
1278	NASDAQ	ATRC	Tue, Sep 7, 2010	7.75	7.86	7.65	7.83
1277	NASDAQ	ATRC	Fri, Sep 3, 2010	7.83	7.87	7.75	7.85
1276	NASDAQ	ATRC	Thu, Sep 2, 2010	7.80	7.83	7.75	7.83
1275	NASDAQ	ATRC	Wed, Sep 1, 2010	7.76	7.85	7.58	7.85
1274	NASDAQ	ATRC	Tue, Aug 31, 2010	7.87	7.87	7.73	7.76
1273	NASDAQ	ATRC	Mon, Aug 30, 2010	7.91	7.91	7.62	7.75
1272	NASDAQ	ATRC	Fri, Aug 27, 2010	7.85	7.92	7.58	7.92
1271	NASDAQ	ATRC	Thu, Aug 26, 2010	7.27	8.00	7.27	7.77
1270	NASDAQ	ATRC	Wed, Aug 25, 2010	7.20	7.38	7.20	7.34
1269	NASDAQ	ATRC	Tue, Aug 24, 2010	7.29	7.49	7.00	7.25
1268	NASDAQ	ATRC	Mon, Aug 23, 2010	7.20	7.45	7.15	7.40
1267	NASDAQ	ATRC	Fri, Aug 20, 2010	7.16	7.20	7.00	7.14
1266	NASDAQ	ATRC	Thu, Aug 19, 2010	6.92	7.20	6.92	7.11
1265	NASDAQ	ATRC	Wed, Aug 18, 2010	6.78	6.91	6.78	6.87
1264	NASDAQ	ATRC	Tue, Aug 17, 2010	6.82	6.82	6.79	6.82
1263	NASDAQ	ATRC	Mon, Aug 16, 2010	6.82	6.82	6.80	6.82
1262	NASDAQ	ATRC	Fri, Aug 13, 2010	6.80	6.82	6.75	6.82
1261	NASDAQ	ATRC	Thu, Aug 12, 2010	6.75	6.82	6.73	6.82
1260	NASDAQ	ATRC	Wed, Aug 11, 2010	6.75	6.80	6.75	6.78
1259	NASDAQ	ATRC	Tue, Aug 10, 2010	6.74	6.82	6.74	6.77
1258	NASDAQ	ATRC	Mon, Aug 9, 2010	6.74	6.81	6.74	6.81
1257	NASDAQ	ATRC	Fri, Aug 6, 2010	6.43	6.70	6.43	6.69
1256	NASDAQ	ATRC	Thu, Aug 5, 2010	6.55	6.55	6.38	6.50
1255	NASDAQ	ATRC	Wed, Aug 4, 2010	6.73	6.75	6.49	6.53
1254	NASDAQ	ATRC	Tue, Aug 3, 2010	6.50	6.71	6.40	6.66
1253	NASDAQ	ATRC	Mon, Aug 2, 2010	6.22	6.54	6.22	6.50
1252	NASDAQ	ATRC	Fri, Jul 30, 2010	6.23	6.49	6.11	6.34
1251	NASDAQ	ATRC	Thu, Jul 29, 2010	6.29	6.44	6.29	6.41
1250	NASDAQ	ATRC	Wed, Jul 28, 2010	6.15	6.40	6.15	6.35
1249	NASDAQ	ATRC	Tue, Jul 27, 2010	6.32	6.36	6.29	6.30
1248	NASDAQ	ATRC	Mon, Jul 26, 2010	6.10	6.36	6.07	6.32
1247	NASDAQ	ATRC	Fri, Jul 23, 2010	6.20	6.34	6.11	6.32
1246	NASDAQ	ATRC	Thu, Jul 22, 2010	6.34	6.34	6.20	6.30
1245	NASDAQ	ATRC	Wed, Jul 21, 2010	6.29	6.30	6.25	6.29
1244	NASDAQ	ATRC	Tue, Jul 20, 2010	6.00	6.32	6.00	6.32
1243	NASDAQ	ATRC	Mon, Jul 19, 2010	6.04	6.06	5.95	6.06
1242	NASDAQ	ATRC	Fri, Jul 16, 2010	6.09	6.12	6.05	6.05
1241	NASDAQ	ATRC	Thu, Jul 15, 2010	6.18	6.18	6.00	6.13
1240	NASDAQ	ATRC	Wed, Jul 14, 2010	6.20	6.20	6.07	6.14
1239	NASDAQ	ATRC	Tue, Jul 13, 2010	6.31	6.31	6.20	6.20
1238	NASDAQ	ATRC	Mon, Jul 12, 2010	6.37	6.44	6.17	6.29
1237	NASDAQ	ATRC	Fri, Jul 9, 2010	6.11	6.30	6.11	6.30
1236	NASDAQ	ATRC	Thu, Jul 8, 2010	6.44	6.45	6.34	6.34
1235	NASDAQ	ATRC	Wed, Jul 7, 2010	6.37	6.49	6.13	6.49
1234	NASDAQ	ATRC	Tue, Jul 6, 2010	6.58	6.58	6.40	6.40
1233	NASDAQ	ATRC	Fri, Jul 2, 2010	6.46	6.56	6.40	6.55
1232	NASDAQ	ATRC	Thu, Jul 1, 2010	6.29	6.50	6.29	6.47
1231	NASDAQ	ATRC	Wed, Jun 30, 2010	6.80	6.81	6.57	6.65
1230	NASDAQ	ATRC	Tue, Jun 29, 2010	6.70	6.85	6.50	6.76
1229	NASDAQ	ATRC	Mon, Jun 28, 2010	6.52	6.89	6.33	6.71
1228	NASDAQ	ATRC	Fri, Jun 25, 2010	6.03	6.52	6.01	6.50
1227	NASDAQ	ATRC	Thu, Jun 24, 2010	6.01	6.06	6.00	6.02
1226	NASDAQ	ATRC	Wed, Jun 23, 2010	6.08	6.08	6.00	6.06
1225	NASDAQ	ATRC	Tue, Jun 22, 2010	6.09	6.20	5.95	6.10
1224	NASDAQ	ATRC	Mon, Jun 21, 2010	6.13	6.13	5.98	6.05
1223	NASDAQ	ATRC	Fri, Jun 18, 2010	6.06	6.21	6.00	6.10
1222	NASDAQ	ATRC	Thu, Jun 17, 2010	6.30	6.30	5.95	6.07
1221	NASDAQ	ATRC	Wed, Jun 16, 2010	6.30	6.39	6.08	6.20
1220	NASDAQ	ATRC	Tue, Jun 15, 2010	6.33	7.20	6.17	6.30
1219	NASDAQ	ATRC	Mon, Jun 14, 2010	5.01	5.47	5.00	5.23
1218	NASDAQ	ATRC	Fri, Jun 11, 2010	5.05	5.05	4.87	5.03
1217	NASDAQ	ATRC	Thu, Jun 10, 2010	5.10	5.24	4.94	5.20
1216	NASDAQ	ATRC	Wed, Jun 9, 2010	5.00	5.33	4.90	4.96
1215	NASDAQ	ATRC	Tue, Jun 8, 2010	4.85	4.85	4.76	4.84
1214	NASDAQ	ATRC	Mon, Jun 7, 2010	4.75	5.01	4.74	4.96
1213	NASDAQ	ATRC	Fri, Jun 4, 2010	5.15	5.15	5.00	5.05
1212	NASDAQ	ATRC	Thu, Jun 3, 2010	5.20	5.25	4.71	5.18
1211	NASDAQ	ATRC	Wed, Jun 2, 2010	5.07	5.12	5.07	5.12
1210	NASDAQ	ATRC	Tue, Jun 1, 2010	5.10	5.15	4.99	5.00
1209	NASDAQ	ATRC	Fri, May 28, 2010	5.21	5.25	4.93	5.10
1208	NASDAQ	ATRC	Thu, May 27, 2010	5.22	5.29	5.09	5.29
1207	NASDAQ	ATRC	Wed, May 26, 2010	5.10	5.13	5.05	5.12
1206	NASDAQ	ATRC	Tue, May 25, 2010	4.99	5.19	4.99	5.10
1205	NASDAQ	ATRC	Mon, May 24, 2010	5.27	5.35	5.00	5.20
1204	NASDAQ	ATRC	Fri, May 21, 2010	4.85	5.35	4.75	5.35
1203	NASDAQ	ATRC	Thu, May 20, 2010	5.10	5.10	4.85	4.91
1202	NASDAQ	ATRC	Wed, May 19, 2010	5.31	5.31	5.10	5.15
1201	NASDAQ	ATRC	Tue, May 18, 2010	5.16	5.45	5.10	5.33
1200	NASDAQ	ATRC	Mon, May 17, 2010	5.48	5.50	4.82	5.05
1199	NASDAQ	ATRC	Fri, May 14, 2010	5.26	5.65	5.26	5.51
1198	NASDAQ	ATRC	Thu, May 13, 2010	5.05	5.67	5.05	5.14
1197	NASDAQ	ATRC	Wed, May 12, 2010	5.32	5.55	5.10	5.11
1196	NASDAQ	ATRC	Tue, May 11, 2010	5.98	5.98	5.27	5.32
1195	NASDAQ	ATRC	Mon, May 10, 2010	5.80	5.80	5.50	5.51
1194	NASDAQ	ATRC	Fri, May 7, 2010	5.55	5.89	5.33	5.40
1193	NASDAQ	ATRC	Thu, May 6, 2010	5.58	5.74	5.51	5.51
1192	NASDAQ	ATRC	Wed, May 5, 2010	5.36	5.71	5.35	5.59
1191	NASDAQ	ATRC	Tue, May 4, 2010	5.64	5.80	5.30	5.30
1190	NASDAQ	ATRC	Mon, May 3, 2010	5.48	5.60	5.46	5.60
1189	NASDAQ	ATRC	Fri, Apr 30, 2010	5.70	5.70	5.57	5.57
1188	NASDAQ	ATRC	Thu, Apr 29, 2010	5.70	5.76	5.69	5.71
1187	NASDAQ	ATRC	Wed, Apr 28, 2010	5.52	5.73	5.52	5.70
1186	NASDAQ	ATRC	Tue, Apr 27, 2010	5.67	5.77	5.51	5.77
1185	NASDAQ	ATRC	Mon, Apr 26, 2010	5.58	5.70	5.55	5.58
1184	NASDAQ	ATRC	Fri, Apr 23, 2010	5.50	5.60	5.50	5.57
1183	NASDAQ	ATRC	Thu, Apr 22, 2010	5.50	5.59	5.50	5.57
1182	NASDAQ	ATRC	Wed, Apr 21, 2010	5.50	5.54	5.37	5.50
1181	NASDAQ	ATRC	Tue, Apr 20, 2010	5.37	5.50	5.37	5.50
1180	NASDAQ	ATRC	Mon, Apr 19, 2010	5.35	5.54	5.35	5.52
1179	NASDAQ	ATRC	Fri, Apr 16, 2010	5.35	5.57	5.35	5.37
1178	NASDAQ	ATRC	Thu, Apr 15, 2010	5.52	5.54	5.28	5.54
1177	NASDAQ	ATRC	Wed, Apr 14, 2010	5.31	5.50	5.29	5.36
1176	NASDAQ	ATRC	Tue, Apr 13, 2010	5.32	5.45	5.31	5.45
1175	NASDAQ	ATRC	Mon, Apr 12, 2010	5.59	5.59	5.31	5.49
1174	NASDAQ	ATRC	Fri, Apr 9, 2010	5.28	5.56	5.25	5.48
1173	NASDAQ	ATRC	Thu, Apr 8, 2010	5.23	5.48	5.15	5.22
1172	NASDAQ	ATRC	Wed, Apr 7, 2010	4.91	5.55	4.91	5.16
1171	NASDAQ	ATRC	Tue, Apr 6, 2010	5.37	5.38	5.31	5.31
1170	NASDAQ	ATRC	Mon, Apr 5, 2010	5.49	5.58	5.35	5.44
1169	NASDAQ	ATRC	Thu, Apr 1, 2010	5.64	5.74	5.27	5.42
1168	NASDAQ	ATRC	Wed, Mar 31, 2010	5.45	6.00	5.41	5.89
1167	NASDAQ	ATRC	Tue, Mar 30, 2010	5.62	5.66	5.50	5.57
1166	NASDAQ	ATRC	Mon, Mar 29, 2010	5.19	5.75	5.19	5.75
1165	NASDAQ	ATRC	Fri, Mar 26, 2010	5.54	5.56	5.54	5.54
1164	NASDAQ	ATRC	Thu, Mar 25, 2010	5.54	5.54	5.47	5.53
1163	NASDAQ	ATRC	Wed, Mar 24, 2010	5.52	5.64	5.45	5.57
1162	NASDAQ	ATRC	Tue, Mar 23, 2010	5.48	5.63	5.48	5.63
1161	NASDAQ	ATRC	Mon, Mar 22, 2010	5.48	5.57	5.48	5.49
1160	NASDAQ	ATRC	Fri, Mar 19, 2010	5.54	5.55	5.25	5.48
1159	NASDAQ	ATRC	Thu, Mar 18, 2010	5.34	5.40	5.34	5.35
1158	NASDAQ	ATRC	Wed, Mar 17, 2010	5.20	5.60	5.13	5.55
1157	NASDAQ	ATRC	Tue, Mar 16, 2010	5.59	5.59	5.23	5.39
1156	NASDAQ	ATRC	Mon, Mar 15, 2010	5.58	5.69	5.38	5.42
1155	NASDAQ	ATRC	Fri, Mar 12, 2010	5.56	5.66	5.31	5.51
1154	NASDAQ	ATRC	Thu, Mar 11, 2010	5.55	5.57	5.25	5.57
1153	NASDAQ	ATRC	Wed, Mar 10, 2010	5.50	5.61	5.22	5.47
1152	NASDAQ	ATRC	Tue, Mar 9, 2010	5.48	5.65	5.48	5.55
1151	NASDAQ	ATRC	Mon, Mar 8, 2010	5.53	5.65	5.51	5.56
1150	NASDAQ	ATRC	Fri, Mar 5, 2010	5.54	5.68	5.44	5.67
1149	NASDAQ	ATRC	Thu, Mar 4, 2010	5.51	5.55	5.38	5.50
1148	NASDAQ	ATRC	Wed, Mar 3, 2010	5.30	5.59	5.19	5.59
1147	NASDAQ	ATRC	Tue, Mar 2, 2010	5.34	5.41	5.31	5.41
1146	NASDAQ	ATRC	Mon, Mar 1, 2010	4.92	5.34	4.90	5.22
1145	NASDAQ	ATRC	Fri, Feb 26, 2010	5.14	5.19	4.76	5.04
1144	NASDAQ	ATRC	Thu, Feb 25, 2010	4.76	5.19	4.75	5.19
1143	NASDAQ	ATRC	Wed, Feb 24, 2010	4.86	5.00	4.75	4.88
1142	NASDAQ	ATRC	Tue, Feb 23, 2010	4.58	4.80	4.58	4.80
1141	NASDAQ	ATRC	Mon, Feb 22, 2010	4.62	4.66	4.56	4.56
1140	NASDAQ	ATRC	Fri, Feb 19, 2010	5.39	5.39	4.54	4.62
1139	NASDAQ	ATRC	Thu, Feb 18, 2010	5.55	5.55	5.25	5.42
1138	NASDAQ	ATRC	Wed, Feb 17, 2010	5.55	5.60	5.49	5.60
1137	NASDAQ	ATRC	Tue, Feb 16, 2010	5.69	5.69	5.50	5.56
1136	NASDAQ	ATRC	Fri, Feb 12, 2010	5.55	5.75	5.55	5.69
1135	NASDAQ	ATRC	Thu, Feb 11, 2010	5.61	5.66	5.60	5.62
1134	NASDAQ	ATRC	Wed, Feb 10, 2010	5.86	5.86	5.59	5.70
1133	NASDAQ	ATRC	Tue, Feb 9, 2010	5.60	6.12	5.56	5.69
1132	NASDAQ	ATRC	Mon, Feb 8, 2010	5.66	5.83	5.62	5.78
1131	NASDAQ	ATRC	Fri, Feb 5, 2010	5.52	5.86	5.51	5.76
1130	NASDAQ	ATRC	Thu, Feb 4, 2010	5.78	5.78	5.37	5.52
1129	NASDAQ	ATRC	Wed, Feb 3, 2010	5.75	5.84	5.73	5.80
1128	NASDAQ	ATRC	Tue, Feb 2, 2010	5.83	5.85	5.80	5.83
1127	NASDAQ	ATRC	Mon, Feb 1, 2010	5.76	5.86	5.76	5.86
1126	NASDAQ	ATRC	Fri, Jan 29, 2010	5.95	6.00	5.71	5.78
1125	NASDAQ	ATRC	Thu, Jan 28, 2010	5.97	6.13	5.84	5.90
1124	NASDAQ	ATRC	Wed, Jan 27, 2010	5.99	5.99	5.91	5.99
1123	NASDAQ	ATRC	Tue, Jan 26, 2010	5.90	6.00	5.90	5.98
1122	NASDAQ	ATRC	Mon, Jan 25, 2010	5.81	6.06	5.81	5.88
1121	NASDAQ	ATRC	Fri, Jan 22, 2010	5.94	6.12	5.81	5.83
1120	NASDAQ	ATRC	Thu, Jan 21, 2010	5.96	6.05	5.96	6.02
1119	NASDAQ	ATRC	Wed, Jan 20, 2010	6.06	6.09	5.86	5.98
1118	NASDAQ	ATRC	Tue, Jan 19, 2010	6.12	6.14	6.01	6.09
1117	NASDAQ	ATRC	Fri, Jan 15, 2010	6.08	6.14	6.08	6.12
1116	NASDAQ	ATRC	Thu, Jan 14, 2010	6.07	6.13	6.07	6.12
1115	NASDAQ	ATRC	Wed, Jan 13, 2010	5.80	6.00	5.80	6.00
1114	NASDAQ	ATRC	Tue, Jan 12, 2010	5.79	5.81	5.68	5.68
1113	NASDAQ	ATRC	Mon, Jan 11, 2010	5.88	5.89	5.69	5.79
1112	NASDAQ	ATRC	Fri, Jan 8, 2010	5.57	5.99	5.50	5.88
1111	NASDAQ	ATRC	Thu, Jan 7, 2010	5.97	5.97	5.75	5.84
1110	NASDAQ	ATRC	Wed, Jan 6, 2010	5.85	5.85	5.54	5.70
1109	NASDAQ	ATRC	Tue, Jan 5, 2010	5.60	6.08	5.60	5.84
1108	NASDAQ	ATRC	Mon, Jan 4, 2010	6.10	6.10	5.56	5.65
1107	NASDAQ	ATRC	Thu, Dec 31, 2009	5.94	6.08	5.80	6.04
1106	NASDAQ	ATRC	Wed, Dec 30, 2009	5.80	6.10	5.80	5.97
1105	NASDAQ	ATRC	Tue, Dec 29, 2009	5.85	5.89	5.51	5.80
1104	NASDAQ	ATRC	Mon, Dec 28, 2009	5.69	5.98	5.67	5.67
1103	NASDAQ	ATRC	Thu, Dec 24, 2009	5.75	6.00	5.66	5.85
1102	NASDAQ	ATRC	Wed, Dec 23, 2009	5.09	5.74	5.00	5.64
1101	NASDAQ	ATRC	Tue, Dec 22, 2009	4.96	5.20	4.96	5.19
1100	NASDAQ	ATRC	Mon, Dec 21, 2009	5.10	5.15	4.88	5.02
1099	NASDAQ	ATRC	Fri, Dec 18, 2009	4.99	5.15	4.99	5.00
1098	NASDAQ	ATRC	Thu, Dec 17, 2009	4.98	5.04	4.87	4.96
1097	NASDAQ	ATRC	Wed, Dec 16, 2009	5.12	5.14	4.98	5.00
1096	NASDAQ	ATRC	Tue, Dec 15, 2009	5.25	5.25	4.95	5.13
1095	NASDAQ	ATRC	Mon, Dec 14, 2009	5.35	5.42	5.25	5.25
1094	NASDAQ	ATRC	Fri, Dec 11, 2009	5.03	5.40	4.97	5.20
1093	NASDAQ	ATRC	Thu, Dec 10, 2009	5.40	5.40	4.91	4.92
1092	NASDAQ	ATRC	Wed, Dec 9, 2009	5.55	5.71	5.30	5.45
1091	NASDAQ	ATRC	Tue, Dec 8, 2009	5.85	5.98	5.78	5.78
1090	NASDAQ	ATRC	Mon, Dec 7, 2009	6.02	6.02	5.87	5.87
1089	NASDAQ	ATRC	Fri, Dec 4, 2009	5.97	6.11	5.96	6.05
1088	NASDAQ	ATRC	Thu, Dec 3, 2009	5.84	5.99	5.84	5.99
1087	NASDAQ	ATRC	Wed, Dec 2, 2009	5.38	5.80	5.38	5.76
1086	NASDAQ	ATRC	Tue, Dec 1, 2009	5.57	5.57	5.26	5.39
1085	NASDAQ	ATRC	Mon, Nov 30, 2009	5.46	5.70	5.45	5.45
1084	NASDAQ	ATRC	Fri, Nov 27, 2009	5.52	5.59	5.45	5.55
1083	NASDAQ	ATRC	Wed, Nov 25, 2009	5.50	5.60	5.43	5.55
1082	NASDAQ	ATRC	Tue, Nov 24, 2009	5.63	5.63	5.40	5.45
1081	NASDAQ	ATRC	Mon, Nov 23, 2009	5.86	5.99	5.58	5.65
1080	NASDAQ	ATRC	Fri, Nov 20, 2009	5.93	5.94	5.66	5.86
1079	NASDAQ	ATRC	Thu, Nov 19, 2009	5.63	5.87	5.63	5.78
1078	NASDAQ	ATRC	Wed, Nov 18, 2009	5.69	5.84	5.64	5.75
1077	NASDAQ	ATRC	Tue, Nov 17, 2009	5.79	6.01	5.60	5.70
1076	NASDAQ	ATRC	Mon, Nov 16, 2009	5.68	6.08	5.46	5.77
1075	NASDAQ	ATRC	Fri, Nov 13, 2009	5.34	5.69	5.10	5.68
1074	NASDAQ	ATRC	Thu, Nov 12, 2009	5.16	5.35	5.16	5.34
1073	NASDAQ	ATRC	Wed, Nov 11, 2009	5.09	5.22	5.09	5.17
1072	NASDAQ	ATRC	Tue, Nov 10, 2009	5.01	5.13	4.99	5.12
1071	NASDAQ	ATRC	Mon, Nov 9, 2009	5.12	5.12	5.00	5.00
1070	NASDAQ	ATRC	Fri, Nov 6, 2009	5.03	5.12	5.00	5.02
1069	NASDAQ	ATRC	Thu, Nov 5, 2009	5.19	5.19	4.86	5.14
1068	NASDAQ	ATRC	Wed, Nov 4, 2009	4.54	5.35	4.43	4.93
1067	NASDAQ	ATRC	Tue, Nov 3, 2009	4.38	4.45	4.28	4.28
1066	NASDAQ	ATRC	Mon, Nov 2, 2009	4.14	4.32	4.01	4.20
1065	NASDAQ	ATRC	Fri, Oct 30, 2009	3.95	4.25	3.95	4.08
1064	NASDAQ	ATRC	Thu, Oct 29, 2009	4.05	4.09	4.00	4.00
1063	NASDAQ	ATRC	Wed, Oct 28, 2009	4.21	4.29	3.94	4.04
1062	NASDAQ	ATRC	Tue, Oct 27, 2009	4.23	4.31	4.20	4.31
1061	NASDAQ	ATRC	Mon, Oct 26, 2009	4.28	4.39	4.09	4.30
1060	NASDAQ	ATRC	Fri, Oct 23, 2009	4.25	4.31	4.20	4.25
1059	NASDAQ	ATRC	Thu, Oct 22, 2009	4.22	4.34	4.16	4.31
1058	NASDAQ	ATRC	Wed, Oct 21, 2009	4.32	4.32	4.21	4.30
1057	NASDAQ	ATRC	Tue, Oct 20, 2009	4.21	4.44	4.21	4.26
1056	NASDAQ	ATRC	Mon, Oct 19, 2009	4.61	4.61	4.10	4.15
1055	NASDAQ	ATRC	Fri, Oct 16, 2009	4.51	4.58	4.46	4.50
1054	NASDAQ	ATRC	Thu, Oct 15, 2009	4.71	4.79	4.52	4.52
1053	NASDAQ	ATRC	Wed, Oct 14, 2009	4.76	4.80	4.30	4.69
1052	NASDAQ	ATRC	Tue, Oct 13, 2009	4.98	5.02	4.42	4.60
1051	NASDAQ	ATRC	Mon, Oct 12, 2009	4.50	4.85	4.45	4.70
1050	NASDAQ	ATRC	Fri, Oct 9, 2009	4.91	5.20	4.61	4.61
1049	NASDAQ	ATRC	Thu, Oct 8, 2009	4.61	4.91	4.60	4.91
1048	NASDAQ	ATRC	Wed, Oct 7, 2009	4.47	4.76	4.47	4.69
1047	NASDAQ	ATRC	Tue, Oct 6, 2009	5.01	5.30	4.19	4.46
1046	NASDAQ	ATRC	Mon, Oct 5, 2009	4.65	4.85	4.65	4.76
1045	NASDAQ	ATRC	Fri, Oct 2, 2009	4.77	5.01	4.51	5.00
1044	NASDAQ	ATRC	Thu, Oct 1, 2009	5.00	5.01	4.91	4.92
1043	NASDAQ	ATRC	Wed, Sep 30, 2009	4.92	5.01	4.72	4.72
1042	NASDAQ	ATRC	Tue, Sep 29, 2009	5.03	5.03	5.00	5.03
1041	NASDAQ	ATRC	Mon, Sep 28, 2009	4.93	5.15	4.93	5.01
1040	NASDAQ	ATRC	Fri, Sep 25, 2009	5.05	5.06	4.84	5.00
1039	NASDAQ	ATRC	Thu, Sep 24, 2009	5.15	5.15	4.97	5.01
1038	NASDAQ	ATRC	Wed, Sep 23, 2009	4.86	5.14	4.85	5.14
1037	NASDAQ	ATRC	Tue, Sep 22, 2009	5.05	5.05	4.76	4.76
1036	NASDAQ	ATRC	Mon, Sep 21, 2009	5.00	5.05	4.96	5.02
1035	NASDAQ	ATRC	Fri, Sep 18, 2009	4.98	5.10	4.65	4.95
1034	NASDAQ	ATRC	Thu, Sep 17, 2009	4.91	5.06	4.81	4.88
1033	NASDAQ	ATRC	Wed, Sep 16, 2009	5.16	5.24	4.72	4.82
1032	NASDAQ	ATRC	Tue, Sep 15, 2009	4.80	5.19	4.80	5.15
1031	NASDAQ	ATRC	Mon, Sep 14, 2009	4.09	4.74	4.05	4.74
1030	NASDAQ	ATRC	Fri, Sep 11, 2009	4.15	4.21	4.05	4.10
1029	NASDAQ	ATRC	Thu, Sep 10, 2009	4.25	4.25	3.90	4.09
1028	NASDAQ	ATRC	Wed, Sep 9, 2009	3.96	4.43	3.96	4.25
1027	NASDAQ	ATRC	Tue, Sep 8, 2009	4.03	4.20	4.00	4.07
1026	NASDAQ	ATRC	Fri, Sep 4, 2009	3.98	3.98	3.90	3.95
1025	NASDAQ	ATRC	Thu, Sep 3, 2009	3.81	3.98	3.80	3.85
1024	NASDAQ	ATRC	Wed, Sep 2, 2009	3.97	3.97	3.79	3.88
1023	NASDAQ	ATRC	Tue, Sep 1, 2009	3.92	3.99	3.86	3.99
1022	NASDAQ	ATRC	Mon, Aug 31, 2009	3.86	3.96	3.82	3.92
1021	NASDAQ	ATRC	Fri, Aug 28, 2009	3.78	3.90	3.76	3.76
1020	NASDAQ	ATRC	Thu, Aug 27, 2009	3.80	3.87	3.80	3.80
1019	NASDAQ	ATRC	Wed, Aug 26, 2009	3.89	3.97	3.59	3.88
1018	NASDAQ	ATRC	Tue, Aug 25, 2009	3.55	3.99	3.55	3.90
1017	NASDAQ	ATRC	Mon, Aug 24, 2009	3.94	3.94	3.55	3.60
1016	NASDAQ	ATRC	Fri, Aug 21, 2009	3.80	3.93	3.72	3.83
1015	NASDAQ	ATRC	Thu, Aug 20, 2009	3.69	3.77	3.59	3.75
1014	NASDAQ	ATRC	Wed, Aug 19, 2009	3.82	3.82	3.60	3.61
1013	NASDAQ	ATRC	Tue, Aug 18, 2009	3.56	3.70	3.55	3.68
1012	NASDAQ	ATRC	Mon, Aug 17, 2009	3.85	3.87	3.56	3.57
1011	NASDAQ	ATRC	Fri, Aug 14, 2009	3.80	3.91	3.62	3.80
1010	NASDAQ	ATRC	Thu, Aug 13, 2009	3.94	3.94	3.77	3.82
1009	NASDAQ	ATRC	Wed, Aug 12, 2009	4.00	4.00	3.95	3.98
1008	NASDAQ	ATRC	Tue, Aug 11, 2009	3.90	4.20	3.76	4.09
1007	NASDAQ	ATRC	Mon, Aug 10, 2009	4.00	4.01	3.88	3.88
1006	NASDAQ	ATRC	Fri, Aug 7, 2009	3.78	4.05	3.71	3.93
1005	NASDAQ	ATRC	Thu, Aug 6, 2009	3.97	4.05	3.57	3.90
1004	NASDAQ	ATRC	Wed, Aug 5, 2009	4.18	4.22	3.95	3.97
1003	NASDAQ	ATRC	Tue, Aug 4, 2009	3.75	4.19	3.67	4.17
1002	NASDAQ	ATRC	Mon, Aug 3, 2009	3.45	3.90	3.41	3.90
1001	NASDAQ	ATRC	Fri, Jul 31, 2009	3.51	3.52	3.44	3.49
1000	NASDAQ	ATRC	Thu, Jul 30, 2009	3.33	3.45	3.32	3.40
999	NASDAQ	ATRC	Wed, Jul 29, 2009	3.32	3.36	3.32	3.36
998	NASDAQ	ATRC	Tue, Jul 28, 2009	3.28	3.34	3.11	3.34
997	NASDAQ	ATRC	Mon, Jul 27, 2009	3.27	3.27	3.03	3.23
996	NASDAQ	ATRC	Fri, Jul 24, 2009	3.10	3.25	3.10	3.18
995	NASDAQ	ATRC	Thu, Jul 23, 2009	3.22	3.28	3.00	3.05
994	NASDAQ	ATRC	Wed, Jul 22, 2009	3.07	3.13	3.05	3.13
993	NASDAQ	ATRC	Tue, Jul 21, 2009	3.23	3.23	3.08	3.08
992	NASDAQ	ATRC	Mon, Jul 20, 2009	3.15	3.31	3.06	3.15
991	NASDAQ	ATRC	Fri, Jul 17, 2009	2.92	3.07	2.90	3.07
990	NASDAQ	ATRC	Thu, Jul 16, 2009	3.11	3.11	2.83	2.93
989	NASDAQ	ATRC	Wed, Jul 15, 2009	3.01	3.11	2.76	2.99
988	NASDAQ	ATRC	Tue, Jul 14, 2009	3.06	3.06	2.80	2.90
987	NASDAQ	ATRC	Mon, Jul 13, 2009	2.86	3.01	2.86	2.93
986	NASDAQ	ATRC	Fri, Jul 10, 2009	3.00	3.03	2.95	3.03
985	NASDAQ	ATRC	Thu, Jul 9, 2009	2.97	3.08	2.88	3.04
984	NASDAQ	ATRC	Wed, Jul 8, 2009	3.03	3.03	2.87	2.90
983	NASDAQ	ATRC	Tue, Jul 7, 2009	3.27	3.31	2.99	3.00
982	NASDAQ	ATRC	Mon, Jul 6, 2009	3.33	3.33	2.96	3.09
981	NASDAQ	ATRC	Thu, Jul 2, 2009	3.41	3.45	3.31	3.31
980	NASDAQ	ATRC	Wed, Jul 1, 2009	3.46	3.74	3.46	3.56
979	NASDAQ	ATRC	Tue, Jun 30, 2009	3.52	3.60	3.45	3.50
978	NASDAQ	ATRC	Mon, Jun 29, 2009	3.54	3.55	3.50	3.51
977	NASDAQ	ATRC	Fri, Jun 26, 2009	3.47	3.55	3.42	3.55
976	NASDAQ	ATRC	Thu, Jun 25, 2009	3.50	3.66	3.40	3.55
975	NASDAQ	ATRC	Wed, Jun 24, 2009	3.85	3.90	3.47	3.47
974	NASDAQ	ATRC	Tue, Jun 23, 2009	3.90	3.91	3.86	3.88
973	NASDAQ	ATRC	Mon, Jun 22, 2009	3.86	3.98	3.84	3.87
972	NASDAQ	ATRC	Fri, Jun 19, 2009	3.53	4.13	3.53	3.90
971	NASDAQ	ATRC	Thu, Jun 18, 2009	3.36	3.56	3.36	3.52
970	NASDAQ	ATRC	Wed, Jun 17, 2009	3.51	3.51	3.34	3.42
969	NASDAQ	ATRC	Tue, Jun 16, 2009	3.30	3.49	3.25	3.48
968	NASDAQ	ATRC	Mon, Jun 15, 2009	3.41	3.41	3.33	3.35
967	NASDAQ	ATRC	Fri, Jun 12, 2009	3.40	3.55	3.40	3.40
966	NASDAQ	ATRC	Thu, Jun 11, 2009	3.36	3.50	3.36	3.40
965	NASDAQ	ATRC	Wed, Jun 10, 2009	3.51	3.56	3.34	3.41
964	NASDAQ	ATRC	Tue, Jun 9, 2009	3.78	3.78	3.20	3.50
963	NASDAQ	ATRC	Mon, Jun 8, 2009	2.80	3.78	2.70	3.78
962	NASDAQ	ATRC	Fri, Jun 5, 2009	2.67	2.79	2.65	2.79
961	NASDAQ	ATRC	Thu, Jun 4, 2009	2.60	2.61	2.58	2.60
960	NASDAQ	ATRC	Wed, Jun 3, 2009	2.54	2.60	2.54	2.58
959	NASDAQ	ATRC	Tue, Jun 2, 2009	2.50	2.60	2.50	2.55
958	NASDAQ	ATRC	Mon, Jun 1, 2009	2.45	2.63	2.45	2.50
957	NASDAQ	ATRC	Fri, May 29, 2009	2.50	2.67	2.42	2.42
956	NASDAQ	ATRC	Thu, May 28, 2009	2.51	2.62	2.49	2.56
955	NASDAQ	ATRC	Wed, May 27, 2009	2.59	2.63	2.52	2.56
954	NASDAQ	ATRC	Tue, May 26, 2009	2.55	2.74	2.51	2.60
953	NASDAQ	ATRC	Fri, May 22, 2009	2.60	2.70	2.54	2.57
952	NASDAQ	ATRC	Thu, May 21, 2009	2.83	2.83	2.45	2.58
951	NASDAQ	ATRC	Wed, May 20, 2009	2.35	2.94	2.35	2.80
950	NASDAQ	ATRC	Tue, May 19, 2009	2.35	2.45	2.31	2.44
949	NASDAQ	ATRC	Mon, May 18, 2009	2.34	2.44	2.34	2.40
948	NASDAQ	ATRC	Fri, May 15, 2009	2.39	2.49	2.29	2.39
947	NASDAQ	ATRC	Thu, May 14, 2009	2.29	2.43	2.23	2.39
946	NASDAQ	ATRC	Wed, May 13, 2009	2.67	2.67	2.36	2.37
945	NASDAQ	ATRC	Tue, May 12, 2009	2.70	2.70	2.40	2.67
944	NASDAQ	ATRC	Mon, May 11, 2009	2.80	2.80	2.59	2.68
943	NASDAQ	ATRC	Fri, May 8, 2009	3.19	3.19	2.70	2.77
942	NASDAQ	ATRC	Thu, May 7, 2009	2.97	3.49	2.68	3.05
941	NASDAQ	ATRC	Wed, May 6, 2009	2.82	3.19	2.56	2.68
940	NASDAQ	ATRC	Tue, May 5, 2009	1.95	3.17	1.90	3.16
939	NASDAQ	ATRC	Mon, May 4, 2009	1.29	1.49	1.20	1.40
938	NASDAQ	ATRC	Fri, May 1, 2009	1.26	1.26	1.19	1.22
937	NASDAQ	ATRC	Thu, Apr 30, 2009	1.26	1.29	1.22	1.22
936	NASDAQ	ATRC	Wed, Apr 29, 2009	1.32	1.42	1.21	1.22
935	NASDAQ	ATRC	Tue, Apr 28, 2009	1.53	2.00	1.20	1.27
934	NASDAQ	ATRC	Mon, Apr 27, 2009	1.11	1.51	1.11	1.34
933	NASDAQ	ATRC	Fri, Apr 24, 2009	1.25	1.38	1.00	1.07
932	NASDAQ	ATRC	Thu, Apr 23, 2009	1.31	1.31	1.22	1.22
931	NASDAQ	ATRC	Wed, Apr 22, 2009	1.26	1.40	1.23	1.30
930	NASDAQ	ATRC	Tue, Apr 21, 2009	1.31	1.32	1.27	1.28
929	NASDAQ	ATRC	Mon, Apr 20, 2009	1.33	1.33	1.30	1.31
928	NASDAQ	ATRC	Fri, Apr 17, 2009	1.37	1.44	1.24	1.38
927	NASDAQ	ATRC	Thu, Apr 16, 2009	1.20	1.39	1.20	1.38
926	NASDAQ	ATRC	Wed, Apr 15, 2009	1.33	1.35	1.20	1.20
925	NASDAQ	ATRC	Tue, Apr 14, 2009	1.25	1.34	1.25	1.29
924	NASDAQ	ATRC	Mon, Apr 13, 2009	1.38	1.38	1.27	1.30
923	NASDAQ	ATRC	Thu, Apr 9, 2009	1.42	1.49	1.31	1.40
922	NASDAQ	ATRC	Wed, Apr 8, 2009	1.39	1.39	1.33	1.33
921	NASDAQ	ATRC	Tue, Apr 7, 2009	1.30	1.30	1.29	1.29
920	NASDAQ	ATRC	Mon, Apr 6, 2009	1.44	1.45	1.33	1.40
919	NASDAQ	ATRC	Fri, Apr 3, 2009	1.45	1.45	1.35	1.40
918	NASDAQ	ATRC	Thu, Apr 2, 2009	1.39	1.40	1.30	1.39
917	NASDAQ	ATRC	Wed, Apr 1, 2009	1.32	1.40	1.27	1.34
916	NASDAQ	ATRC	Tue, Mar 31, 2009	1.31	1.40	1.27	1.28
915	NASDAQ	ATRC	Mon, Mar 30, 2009	1.49	1.49	1.28	1.36
914	NASDAQ	ATRC	Fri, Mar 27, 2009	1.32	1.44	1.27	1.32
913	NASDAQ	ATRC	Thu, Mar 26, 2009	1.38	1.39	1.29	1.37
912	NASDAQ	ATRC	Wed, Mar 25, 2009	1.30	1.40	1.25	1.30
911	NASDAQ	ATRC	Tue, Mar 24, 2009	1.60	1.60	1.28	1.28
910	NASDAQ	ATRC	Mon, Mar 23, 2009	1.45	1.46	1.33	1.41
909	NASDAQ	ATRC	Fri, Mar 20, 2009	1.59	1.59	1.37	1.42
908	NASDAQ	ATRC	Thu, Mar 19, 2009	1.41	1.42	1.31	1.40
907	NASDAQ	ATRC	Wed, Mar 18, 2009	1.41	1.41	1.38	1.40
906	NASDAQ	ATRC	Tue, Mar 17, 2009	1.43	1.43	1.38	1.40
905	NASDAQ	ATRC	Mon, Mar 16, 2009	1.35	1.50	1.35	1.38
904	NASDAQ	ATRC	Fri, Mar 13, 2009	1.30	1.32	1.26	1.26
903	NASDAQ	ATRC	Thu, Mar 12, 2009	1.26	1.30	1.25	1.29
902	NASDAQ	ATRC	Wed, Mar 11, 2009	1.34	1.34	1.25	1.25
901	NASDAQ	ATRC	Tue, Mar 10, 2009	1.25	1.35	1.25	1.35
900	NASDAQ	ATRC	Mon, Mar 9, 2009	1.30	1.31	1.25	1.25
899	NASDAQ	ATRC	Fri, Mar 6, 2009	1.24	1.30	1.20	1.25
898	NASDAQ	ATRC	Thu, Mar 5, 2009	1.30	1.30	1.20	1.29
897	NASDAQ	ATRC	Wed, Mar 4, 2009	1.30	1.32	1.25	1.27
896	NASDAQ	ATRC	Tue, Mar 3, 2009	1.41	1.70	1.27	1.27
895	NASDAQ	ATRC	Mon, Mar 2, 2009	1.27	1.31	1.20	1.26
894	NASDAQ	ATRC	Fri, Feb 27, 2009	1.25	1.50	1.25	1.32
893	NASDAQ	ATRC	Thu, Feb 26, 2009	1.35	1.40	1.21	1.21
892	NASDAQ	ATRC	Wed, Feb 25, 2009	1.35	1.46	1.27	1.28
891	NASDAQ	ATRC	Tue, Feb 24, 2009	1.45	1.45	1.21	1.32
890	NASDAQ	ATRC	Mon, Feb 23, 2009	1.78	1.79	1.46	1.58
889	NASDAQ	ATRC	Fri, Feb 20, 2009	1.79	1.79	1.65	1.70
888	NASDAQ	ATRC	Thu, Feb 19, 2009	1.48	1.66	1.45	1.66
887	NASDAQ	ATRC	Wed, Feb 18, 2009	1.63	1.63	1.52	1.52
886	NASDAQ	ATRC	Tue, Feb 17, 2009	1.62	1.80	1.51	1.57
885	NASDAQ	ATRC	Fri, Feb 13, 2009	1.64	1.77	1.50	1.62
884	NASDAQ	ATRC	Thu, Feb 12, 2009	1.60	1.66	1.60	1.60
883	NASDAQ	ATRC	Wed, Feb 11, 2009	1.63	1.67	1.58	1.65
882	NASDAQ	ATRC	Tue, Feb 10, 2009	1.60	1.63	1.46	1.50
881	NASDAQ	ATRC	Mon, Feb 9, 2009	1.41	1.70	1.41	1.54
880	NASDAQ	ATRC	Fri, Feb 6, 2009	1.41	1.43	1.38	1.40
879	NASDAQ	ATRC	Thu, Feb 5, 2009	1.40	1.56	1.35	1.41
878	NASDAQ	ATRC	Wed, Feb 4, 2009	1.31	1.40	1.27	1.39
877	NASDAQ	ATRC	Tue, Feb 3, 2009	1.31	1.38	1.21	1.35
876	NASDAQ	ATRC	Mon, Feb 2, 2009	1.40	1.43	1.34	1.34
875	NASDAQ	ATRC	Fri, Jan 30, 2009	1.26	1.43	1.23	1.35
874	NASDAQ	ATRC	Thu, Jan 29, 2009	1.67	1.67	1.15	1.34
873	NASDAQ	ATRC	Wed, Jan 28, 2009	1.71	1.72	1.70	1.72
872	NASDAQ	ATRC	Tue, Jan 27, 2009	1.70	1.74	1.65	1.72
871	NASDAQ	ATRC	Mon, Jan 26, 2009	1.82	1.82	1.69	1.72
870	NASDAQ	ATRC	Fri, Jan 23, 2009	1.81	1.85	1.80	1.82
869	NASDAQ	ATRC	Thu, Jan 22, 2009	2.99	2.99	1.81	1.83
868	NASDAQ	ATRC	Wed, Jan 21, 2009	1.85	1.87	1.85	1.86
867	NASDAQ	ATRC	Tue, Jan 20, 2009	1.87	1.88	1.84	1.85
866	NASDAQ	ATRC	Fri, Jan 16, 2009	2.04	2.04	1.86	1.86
865	NASDAQ	ATRC	Thu, Jan 15, 2009	1.91	1.91	1.90	1.90
864	NASDAQ	ATRC	Wed, Jan 14, 2009	1.95	2.03	1.94	1.94
863	NASDAQ	ATRC	Tue, Jan 13, 2009	2.00	2.22	1.97	2.10
862	NASDAQ	ATRC	Mon, Jan 12, 2009	2.18	2.23	2.03	2.05
861	NASDAQ	ATRC	Fri, Jan 9, 2009	2.18	2.25	2.18	2.20
860	NASDAQ	ATRC	Thu, Jan 8, 2009	2.15	2.15	2.14	2.15
859	NASDAQ	ATRC	Wed, Jan 7, 2009	2.29	2.30	2.18	2.18
858	NASDAQ	ATRC	Tue, Jan 6, 2009	2.33	2.33	2.15	2.19
857	NASDAQ	ATRC	Mon, Jan 5, 2009	2.14	2.77	2.10	2.15
856	NASDAQ	ATRC	Fri, Jan 2, 2009	2.20	2.24	2.18	2.20
855	NASDAQ	ATRC	Wed, Dec 31, 2008	2.05	2.23	2.04	2.22
854	NASDAQ	ATRC	Tue, Dec 30, 2008	2.00	2.04	2.00	2.04
853	NASDAQ	ATRC	Mon, Dec 29, 2008	2.23	2.24	1.98	2.00
852	NASDAQ	ATRC	Fri, Dec 26, 2008	2.35	2.35	2.21	2.26
851	NASDAQ	ATRC	Wed, Dec 24, 2008	2.28	2.36	2.18	2.27
850	NASDAQ	ATRC	Tue, Dec 23, 2008	2.05	2.84	2.05	2.34
849	NASDAQ	ATRC	Mon, Dec 22, 2008	2.25	2.26	1.91	2.06
848	NASDAQ	ATRC	Fri, Dec 19, 2008	2.21	2.45	2.06	2.27
847	NASDAQ	ATRC	Thu, Dec 18, 2008	2.10	2.26	2.01	2.26
846	NASDAQ	ATRC	Wed, Dec 17, 2008	2.10	2.20	2.07	2.07
845	NASDAQ	ATRC	Tue, Dec 16, 2008	2.23	2.25	2.15	2.15
844	NASDAQ	ATRC	Mon, Dec 15, 2008	2.32	2.32	2.15	2.15
843	NASDAQ	ATRC	Fri, Dec 12, 2008	2.30	2.34	2.24	2.24
842	NASDAQ	ATRC	Thu, Dec 11, 2008	2.35	2.50	2.35	2.40
841	NASDAQ	ATRC	Wed, Dec 10, 2008	2.10	2.63	2.10	2.40
840	NASDAQ	ATRC	Tue, Dec 9, 2008	2.11	2.20	2.10	2.14
839	NASDAQ	ATRC	Mon, Dec 8, 2008	2.18	2.23	2.14	2.17
838	NASDAQ	ATRC	Fri, Dec 5, 2008	2.11	2.19	2.11	2.18
837	NASDAQ	ATRC	Thu, Dec 4, 2008	2.18	2.21	2.11	2.11
836	NASDAQ	ATRC	Wed, Dec 3, 2008	2.40	2.40	2.17	2.18
835	NASDAQ	ATRC	Tue, Dec 2, 2008	2.51	2.51	2.40	2.40
834	NASDAQ	ATRC	Mon, Dec 1, 2008	2.50	2.57	2.45	2.50
833	NASDAQ	ATRC	Fri, Nov 28, 2008	2.49	2.49	2.47	2.47
832	NASDAQ	ATRC	Wed, Nov 26, 2008	2.50	2.58	2.48	2.50
831	NASDAQ	ATRC	Tue, Nov 25, 2008	2.60	2.61	2.40	2.49
830	NASDAQ	ATRC	Mon, Nov 24, 2008	2.55	2.70	2.49	2.55
829	NASDAQ	ATRC	Fri, Nov 21, 2008	2.69	2.71	2.37	2.49
828	NASDAQ	ATRC	Thu, Nov 20, 2008	2.90	2.90	2.47	2.53
827	NASDAQ	ATRC	Wed, Nov 19, 2008	3.33	3.35	2.85	2.93
826	NASDAQ	ATRC	Tue, Nov 18, 2008	3.47	3.48	3.22	3.22
825	NASDAQ	ATRC	Mon, Nov 17, 2008	3.47	3.51	3.33	3.37
824	NASDAQ	ATRC	Fri, Nov 14, 2008	3.36	3.48	3.22	3.47
823	NASDAQ	ATRC	Thu, Nov 13, 2008	3.61	3.65	3.41	3.50
822	NASDAQ	ATRC	Wed, Nov 12, 2008	4.00	4.00	3.59	3.70
821	NASDAQ	ATRC	Tue, Nov 11, 2008	3.49	4.09	3.28	4.00
820	NASDAQ	ATRC	Mon, Nov 10, 2008	3.23	3.50	2.92	3.47
819	NASDAQ	ATRC	Fri, Nov 7, 2008	3.00	3.14	2.85	2.99
818	NASDAQ	ATRC	Thu, Nov 6, 2008	3.15	3.16	2.86	2.90
817	NASDAQ	ATRC	Wed, Nov 5, 2008	3.63	3.68	3.01	3.14
816	NASDAQ	ATRC	Tue, Nov 4, 2008	4.08	4.15	3.45	3.71
815	NASDAQ	ATRC	Mon, Nov 3, 2008	3.95	4.29	3.00	3.89
814	NASDAQ	ATRC	Fri, Oct 31, 2008	6.42	6.48	6.41	6.42
813	NASDAQ	ATRC	Thu, Oct 30, 2008	6.47	6.78	5.80	6.46
812	NASDAQ	ATRC	Wed, Oct 29, 2008	5.89	6.59	5.89	6.47
811	NASDAQ	ATRC	Tue, Oct 28, 2008	5.73	5.79	5.70	5.70
810	NASDAQ	ATRC	Mon, Oct 27, 2008	5.65	5.68	5.40	5.57
809	NASDAQ	ATRC	Fri, Oct 24, 2008	5.80	6.27	5.60	5.60
808	NASDAQ	ATRC	Thu, Oct 23, 2008	7.30	7.30	6.00	6.19
807	NASDAQ	ATRC	Wed, Oct 22, 2008	8.01	8.01	7.26	7.31
806	NASDAQ	ATRC	Tue, Oct 21, 2008	8.02	8.02	7.54	7.75
805	NASDAQ	ATRC	Mon, Oct 20, 2008	7.70	8.24	7.63	7.97
804	NASDAQ	ATRC	Fri, Oct 17, 2008	7.89	7.89	7.72	7.72
803	NASDAQ	ATRC	Thu, Oct 16, 2008	7.62	7.79	7.50	7.79
802	NASDAQ	ATRC	Wed, Oct 15, 2008	7.68	7.73	7.47	7.66
801	NASDAQ	ATRC	Tue, Oct 14, 2008	7.90	8.06	7.20	7.53
800	NASDAQ	ATRC	Mon, Oct 13, 2008	7.60	8.02	7.60	7.79
799	NASDAQ	ATRC	Fri, Oct 10, 2008	8.00	8.00	7.75	7.83
798	NASDAQ	ATRC	Thu, Oct 9, 2008	8.48	8.88	8.16	8.16
797	NASDAQ	ATRC	Wed, Oct 8, 2008	8.20	8.40	8.00	8.38
796	NASDAQ	ATRC	Tue, Oct 7, 2008	8.36	8.49	8.35	8.49
795	NASDAQ	ATRC	Mon, Oct 6, 2008	8.93	8.93	8.16	8.37
794	NASDAQ	ATRC	Fri, Oct 3, 2008	9.33	9.33	8.16	9.25
793	NASDAQ	ATRC	Thu, Oct 2, 2008	9.62	9.98	9.18	9.18
792	NASDAQ	ATRC	Wed, Oct 1, 2008	9.67	9.72	9.33	9.53
791	NASDAQ	ATRC	Tue, Sep 30, 2008	9.89	10.02	9.40	9.91
790	NASDAQ	ATRC	Mon, Sep 29, 2008	10.03	10.15	9.90	9.97
789	NASDAQ	ATRC	Fri, Sep 26, 2008	10.02	10.05	10.00	10.00
788	NASDAQ	ATRC	Thu, Sep 25, 2008	10.50	10.50	9.99	9.99
787	NASDAQ	ATRC	Wed, Sep 24, 2008	10.19	10.25	9.99	10.23
786	NASDAQ	ATRC	Tue, Sep 23, 2008	10.21	10.26	9.97	10.00
785	NASDAQ	ATRC	Mon, Sep 22, 2008	10.43	10.43	10.20	10.26
784	NASDAQ	ATRC	Fri, Sep 19, 2008	10.77	10.77	9.98	10.61
783	NASDAQ	ATRC	Thu, Sep 18, 2008	10.10	10.87	10.00	10.75
782	NASDAQ	ATRC	Wed, Sep 17, 2008	10.12	10.30	10.12	10.28
781	NASDAQ	ATRC	Tue, Sep 16, 2008	10.01	10.24	10.00	10.09
780	NASDAQ	ATRC	Mon, Sep 15, 2008	10.01	10.01	10.01	10.01
779	NASDAQ	ATRC	Thu, Sep 11, 2008	10.39	10.39	10.16	10.16
778	NASDAQ	ATRC	Wed, Sep 10, 2008	11.43	11.46	10.15	10.20
777	NASDAQ	ATRC	Tue, Sep 9, 2008	10.59	10.60	10.15	10.17
776	NASDAQ	ATRC	Mon, Sep 8, 2008	10.77	10.78	10.47	10.75
775	NASDAQ	ATRC	Fri, Sep 5, 2008	10.63	10.77	10.48	10.71
774	NASDAQ	ATRC	Thu, Sep 4, 2008	10.25	10.54	10.14	10.54
773	NASDAQ	ATRC	Wed, Sep 3, 2008	10.10	10.18	10.00	10.08
772	NASDAQ	ATRC	Tue, Sep 2, 2008	10.40	10.40	10.10	10.18
771	NASDAQ	ATRC	Fri, Aug 29, 2008	10.33	10.39	10.25	10.25
770	NASDAQ	ATRC	Thu, Aug 28, 2008	10.69	10.69	10.03	10.21
769	NASDAQ	ATRC	Wed, Aug 27, 2008	10.84	11.40	10.78	10.82
768	NASDAQ	ATRC	Tue, Aug 26, 2008	10.34	11.32	10.34	10.63
767	NASDAQ	ATRC	Mon, Aug 25, 2008	10.88	10.98	10.41	10.68
766	NASDAQ	ATRC	Thu, Aug 21, 2008	10.75	10.75	10.48	10.70
765	NASDAQ	ATRC	Wed, Aug 20, 2008	10.95	10.95	10.68	10.74
764	NASDAQ	ATRC	Tue, Aug 19, 2008	10.74	10.75	10.70	10.74
763	NASDAQ	ATRC	Mon, Aug 18, 2008	10.87	10.90	10.70	10.75
762	NASDAQ	ATRC	Fri, Aug 15, 2008	11.00	11.00	10.63	10.97
761	NASDAQ	ATRC	Thu, Aug 14, 2008	11.06	11.10	10.87	10.99
760	NASDAQ	ATRC	Wed, Aug 13, 2008	11.03	11.22	11.00	11.22
759	NASDAQ	ATRC	Tue, Aug 12, 2008	11.14	11.27	11.10	11.23
758	NASDAQ	ATRC	Mon, Aug 11, 2008	10.41	11.15	10.41	11.14
757	NASDAQ	ATRC	Fri, Aug 8, 2008	10.56	10.56	10.34	10.39
756	NASDAQ	ATRC	Thu, Aug 7, 2008	10.41	10.57	10.35	10.44
755	NASDAQ	ATRC	Wed, Aug 6, 2008	10.63	10.63	10.27	10.54
754	NASDAQ	ATRC	Tue, Aug 5, 2008	10.06	10.56	9.95	10.43
753	NASDAQ	ATRC	Mon, Aug 4, 2008	10.00	10.00	9.83	9.83
752	NASDAQ	ATRC	Fri, Aug 1, 2008	9.77	9.80	9.69	9.80
751	NASDAQ	ATRC	Thu, Jul 31, 2008	9.99	10.26	9.59	9.65
750	NASDAQ	ATRC	Wed, Jul 30, 2008	10.05	10.15	10.05	10.05
749	NASDAQ	ATRC	Tue, Jul 29, 2008	10.44	10.49	10.02	10.05
748	NASDAQ	ATRC	Mon, Jul 28, 2008	10.45	10.61	10.30	10.30
747	NASDAQ	ATRC	Thu, Jul 24, 2008	10.90	10.90	10.34	10.63
746	NASDAQ	ATRC	Wed, Jul 23, 2008	10.32	10.59	10.05	10.13
745	NASDAQ	ATRC	Tue, Jul 22, 2008	10.88	10.89	10.05	10.29
744	NASDAQ	ATRC	Mon, Jul 21, 2008	10.15	11.79	10.00	10.01
743	NASDAQ	ATRC	Fri, Jul 18, 2008	10.46	10.69	10.14	10.40
742	NASDAQ	ATRC	Thu, Jul 17, 2008	10.61	10.67	10.10	10.59
741	NASDAQ	ATRC	Wed, Jul 16, 2008	10.34	10.80	10.34	10.57
740	NASDAQ	ATRC	Tue, Jul 15, 2008	10.46	10.46	10.11	10.25
739	NASDAQ	ATRC	Mon, Jul 14, 2008	10.39	10.52	10.25	10.36
738	NASDAQ	ATRC	Fri, Jul 11, 2008	10.84	10.84	10.27	10.27
737	NASDAQ	ATRC	Thu, Jul 10, 2008	10.90	10.95	10.81	10.89
736	NASDAQ	ATRC	Wed, Jul 9, 2008	10.99	11.07	10.61	10.86
735	NASDAQ	ATRC	Tue, Jul 8, 2008	10.67	10.86	10.45	10.86
734	NASDAQ	ATRC	Mon, Jul 7, 2008	10.92	11.08	10.24	10.38
733	NASDAQ	ATRC	Thu, Jul 3, 2008	11.10	11.35	10.69	10.70
732	NASDAQ	ATRC	Wed, Jul 2, 2008	10.93	11.05	10.49	10.82
731	NASDAQ	ATRC	Tue, Jul 1, 2008	10.69	11.49	10.69	11.02
730	NASDAQ	ATRC	Mon, Jun 30, 2008	11.63	11.64	10.69	10.80
729	NASDAQ	ATRC	Fri, Jun 27, 2008	11.02	11.37	11.00	11.32
728	NASDAQ	ATRC	Thu, Jun 26, 2008	11.10	11.10	10.71	10.99
727	NASDAQ	ATRC	Wed, Jun 25, 2008	11.00	11.25	10.61	10.95
726	NASDAQ	ATRC	Tue, Jun 24, 2008	11.25	11.61	10.66	10.80
725	NASDAQ	ATRC	Mon, Jun 23, 2008	11.76	11.79	10.59	11.08
724	NASDAQ	ATRC	Fri, Jun 20, 2008	11.64	11.80	11.01	11.36
723	NASDAQ	ATRC	Thu, Jun 19, 2008	11.55	11.79	11.00	11.65
722	NASDAQ	ATRC	Wed, Jun 18, 2008	11.16	11.70	11.02	11.55
721	NASDAQ	ATRC	Tue, Jun 17, 2008	10.99	11.82	10.99	11.80
720	NASDAQ	ATRC	Mon, Jun 16, 2008	10.55	11.00	10.55	11.00
719	NASDAQ	ATRC	Fri, Jun 13, 2008	10.24	10.70	10.24	10.70
718	NASDAQ	ATRC	Thu, Jun 12, 2008	9.99	10.31	9.89	10.28
717	NASDAQ	ATRC	Wed, Jun 11, 2008	10.37	10.68	10.22	10.49
716	NASDAQ	ATRC	Tue, Jun 10, 2008	10.37	10.87	10.37	10.80
715	NASDAQ	ATRC	Mon, Jun 9, 2008	9.88	10.72	9.88	10.27
714	NASDAQ	ATRC	Fri, Jun 6, 2008	9.90	9.90	9.82	9.82
713	NASDAQ	ATRC	Thu, Jun 5, 2008	9.48	10.02	9.06	9.83
712	NASDAQ	ATRC	Wed, Jun 4, 2008	9.64	10.10	9.46	9.92
711	NASDAQ	ATRC	Tue, Jun 3, 2008	9.93	9.96	9.52	9.80
710	NASDAQ	ATRC	Mon, Jun 2, 2008	10.00	10.31	9.68	9.72
709	NASDAQ	ATRC	Fri, May 30, 2008	10.06	10.08	9.81	9.81
708	NASDAQ	ATRC	Thu, May 29, 2008	10.05	10.05	9.98	10.01
707	NASDAQ	ATRC	Wed, May 28, 2008	10.15	10.22	9.99	10.10
706	NASDAQ	ATRC	Tue, May 27, 2008	10.22	10.27	9.90	10.11
705	NASDAQ	ATRC	Fri, May 23, 2008	10.45	10.45	10.20	10.22
704	NASDAQ	ATRC	Thu, May 22, 2008	10.20	10.20	9.96	10.00
703	NASDAQ	ATRC	Wed, May 21, 2008	10.30	10.30	9.79	10.00
702	NASDAQ	ATRC	Tue, May 20, 2008	10.95	11.00	10.29	10.29
701	NASDAQ	ATRC	Mon, May 19, 2008	11.18	11.30	10.78	11.00
700	NASDAQ	ATRC	Fri, May 16, 2008	11.23	11.25	11.07	11.25
699	NASDAQ	ATRC	Thu, May 15, 2008	11.13	11.37	10.97	11.15
698	NASDAQ	ATRC	Wed, May 14, 2008	11.29	11.29	10.89	11.05
697	NASDAQ	ATRC	Tue, May 13, 2008	11.07	11.29	11.01	11.15
696	NASDAQ	ATRC	Mon, May 12, 2008	11.35	11.35	10.87	11.00
695	NASDAQ	ATRC	Fri, May 9, 2008	11.40	11.64	11.38	11.38
694	NASDAQ	ATRC	Thu, May 8, 2008	12.21	12.21	11.25	11.25
693	NASDAQ	ATRC	Wed, May 7, 2008	11.97	12.30	11.50	12.30
692	NASDAQ	ATRC	Tue, May 6, 2008	12.86	12.86	11.57	11.78
691	NASDAQ	ATRC	Mon, May 5, 2008	13.19	13.24	12.31	12.47
690	NASDAQ	ATRC	Fri, May 2, 2008	13.34	13.46	13.34	13.36
689	NASDAQ	ATRC	Thu, May 1, 2008	13.27	13.37	12.80	13.34
688	NASDAQ	ATRC	Wed, Apr 30, 2008	13.50	13.54	13.20	13.36
687	NASDAQ	ATRC	Tue, Apr 29, 2008	13.59	13.59	13.40	13.53
686	NASDAQ	ATRC	Mon, Apr 28, 2008	13.00	13.61	12.81	13.57
685	NASDAQ	ATRC	Fri, Apr 25, 2008	12.79	13.24	12.79	13.24
684	NASDAQ	ATRC	Thu, Apr 24, 2008	12.60	12.77	12.59	12.77
683	NASDAQ	ATRC	Wed, Apr 23, 2008	12.00	12.78	11.84	12.58
682	NASDAQ	ATRC	Tue, Apr 22, 2008	12.69	12.69	11.49	11.84
681	NASDAQ	ATRC	Mon, Apr 21, 2008	12.77	12.78	12.69	12.78
680	NASDAQ	ATRC	Fri, Apr 18, 2008	12.91	13.00	12.65	12.93
679	NASDAQ	ATRC	Thu, Apr 17, 2008	12.98	13.00	12.90	12.99
678	NASDAQ	ATRC	Wed, Apr 16, 2008	12.98	13.25	12.75	12.78
677	NASDAQ	ATRC	Tue, Apr 15, 2008	12.88	12.99	12.88	12.96
676	NASDAQ	ATRC	Mon, Apr 14, 2008	12.95	13.00	12.67	12.83
675	NASDAQ	ATRC	Fri, Apr 11, 2008	12.67	12.80	12.67	12.80
674	NASDAQ	ATRC	Thu, Apr 10, 2008	12.57	12.83	12.56	12.80
673	NASDAQ	ATRC	Wed, Apr 9, 2008	12.96	13.00	12.65	12.65
672	NASDAQ	ATRC	Tue, Apr 8, 2008	12.79	12.99	12.79	12.99
671	NASDAQ	ATRC	Mon, Apr 7, 2008	12.97	13.00	12.92	12.97
670	NASDAQ	ATRC	Fri, Apr 4, 2008	13.14	13.39	12.85	12.98
669	NASDAQ	ATRC	Thu, Apr 3, 2008	13.34	13.61	13.19	13.40
668	NASDAQ	ATRC	Wed, Apr 2, 2008	12.96	13.60	12.96	13.52
667	NASDAQ	ATRC	Tue, Apr 1, 2008	12.08	13.12	12.08	13.12
666	NASDAQ	ATRC	Mon, Mar 31, 2008	12.22	12.74	12.22	12.74
665	NASDAQ	ATRC	Fri, Mar 28, 2008	11.73	12.60	11.53	12.04
664	NASDAQ	ATRC	Thu, Mar 27, 2008	12.78	13.55	11.57	11.58
663	NASDAQ	ATRC	Wed, Mar 26, 2008	12.59	12.99	12.59	12.98
662	NASDAQ	ATRC	Tue, Mar 25, 2008	12.50	12.68	12.49	12.66
661	NASDAQ	ATRC	Mon, Mar 24, 2008	12.05	12.51	12.05	12.51
660	NASDAQ	ATRC	Thu, Mar 20, 2008	11.71	12.08	11.71	12.04
659	NASDAQ	ATRC	Wed, Mar 19, 2008	11.30	11.80	11.30	11.80
658	NASDAQ	ATRC	Tue, Mar 18, 2008	11.27	11.37	11.09	11.37
657	NASDAQ	ATRC	Mon, Mar 17, 2008	10.84	11.25	10.84	11.01
656	NASDAQ	ATRC	Fri, Mar 14, 2008	11.39	11.39	10.98	11.00
655	NASDAQ	ATRC	Thu, Mar 13, 2008	11.23	11.27	11.05	11.13
654	NASDAQ	ATRC	Wed, Mar 12, 2008	11.00	11.29	11.00	11.28
653	NASDAQ	ATRC	Tue, Mar 11, 2008	10.89	11.16	10.89	11.07
652	NASDAQ	ATRC	Mon, Mar 10, 2008	11.68	11.72	10.85	10.85
651	NASDAQ	ATRC	Fri, Mar 7, 2008	11.67	11.80	11.64	11.69
650	NASDAQ	ATRC	Thu, Mar 6, 2008	11.96	11.96	11.74	11.77
649	NASDAQ	ATRC	Wed, Mar 5, 2008	12.11	12.12	11.96	11.96
648	NASDAQ	ATRC	Tue, Mar 4, 2008	11.90	12.26	11.84	12.26
647	NASDAQ	ATRC	Mon, Mar 3, 2008	11.74	12.06	11.74	11.78
646	NASDAQ	ATRC	Fri, Feb 29, 2008	11.99	12.09	11.90	11.90
645	NASDAQ	ATRC	Thu, Feb 28, 2008	12.16	12.42	11.87	11.87
644	NASDAQ	ATRC	Wed, Feb 27, 2008	12.01	12.01	11.90	11.90
643	NASDAQ	ATRC	Tue, Feb 26, 2008	12.20	12.23	12.01	12.08
642	NASDAQ	ATRC	Mon, Feb 25, 2008	11.95	12.38	11.47	12.10
641	NASDAQ	ATRC	Fri, Feb 22, 2008	12.61	12.65	11.47	12.08
640	NASDAQ	ATRC	Thu, Feb 21, 2008	12.95	12.96	12.71	12.77
639	NASDAQ	ATRC	Wed, Feb 20, 2008	13.13	13.16	12.71	12.75
638	NASDAQ	ATRC	Tue, Feb 19, 2008	13.75	13.75	13.02	13.07
637	NASDAQ	ATRC	Fri, Feb 15, 2008	13.63	13.75	13.38	13.64
636	NASDAQ	ATRC	Thu, Feb 14, 2008	13.85	13.97	13.56	13.80
635	NASDAQ	ATRC	Wed, Feb 13, 2008	13.83	14.12	13.37	13.61
634	NASDAQ	ATRC	Tue, Feb 12, 2008	13.94	14.00	13.46	14.00
633	NASDAQ	ATRC	Mon, Feb 11, 2008	13.42	14.00	13.35	13.97
632	NASDAQ	ATRC	Fri, Feb 8, 2008	13.25	13.68	13.13	13.68
631	NASDAQ	ATRC	Thu, Feb 7, 2008	13.25	13.56	12.94	13.26
630	NASDAQ	ATRC	Wed, Feb 6, 2008	13.50	13.80	13.31	13.31
629	NASDAQ	ATRC	Tue, Feb 5, 2008	13.64	13.72	13.19	13.32
628	NASDAQ	ATRC	Mon, Feb 4, 2008	13.76	13.97	13.09	13.55
627	NASDAQ	ATRC	Fri, Feb 1, 2008	13.95	14.00	12.31	14.00
626	NASDAQ	ATRC	Thu, Jan 31, 2008	13.69	14.02	13.68	13.94
625	NASDAQ	ATRC	Wed, Jan 30, 2008	13.59	14.00	13.59	13.88
624	NASDAQ	ATRC	Tue, Jan 29, 2008	13.32	14.00	13.28	14.00
623	NASDAQ	ATRC	Mon, Jan 28, 2008	13.25	13.50	12.49	13.41
622	NASDAQ	ATRC	Fri, Jan 25, 2008	13.43	13.46	13.21	13.40
621	NASDAQ	ATRC	Thu, Jan 24, 2008	13.30	13.44	12.70	13.28
620	NASDAQ	ATRC	Wed, Jan 23, 2008	12.89	13.44	12.71	13.01
619	NASDAQ	ATRC	Tue, Jan 22, 2008	12.58	13.58	12.01	13.10
618	NASDAQ	ATRC	Fri, Jan 18, 2008	14.00	14.00	13.00	13.04
617	NASDAQ	ATRC	Thu, Jan 17, 2008	13.70	14.02	13.70	13.93
616	NASDAQ	ATRC	Wed, Jan 16, 2008	13.75	14.25	13.75	14.05
615	NASDAQ	ATRC	Tue, Jan 15, 2008	13.73	14.05	13.73	13.93
614	NASDAQ	ATRC	Mon, Jan 14, 2008	14.17	14.38	13.90	13.91
613	NASDAQ	ATRC	Fri, Jan 11, 2008	13.62	14.12	13.62	13.90
612	NASDAQ	ATRC	Thu, Jan 10, 2008	13.72	13.72	13.50	13.58
611	NASDAQ	ATRC	Wed, Jan 9, 2008	13.92	13.92	13.54	13.70
610	NASDAQ	ATRC	Tue, Jan 8, 2008	13.69	14.04	13.64	13.67
609	NASDAQ	ATRC	Mon, Jan 7, 2008	13.95	13.95	13.41	13.70
608	NASDAQ	ATRC	Fri, Jan 4, 2008	13.01	13.73	12.92	13.73
607	NASDAQ	ATRC	Thu, Jan 3, 2008	13.41	13.41	13.00	13.02
606	NASDAQ	ATRC	Wed, Jan 2, 2008	13.35	13.55	13.00	13.24
605	NASDAQ	ATRC	Mon, Dec 31, 2007	13.22	13.54	13.00	13.11
604	NASDAQ	ATRC	Fri, Dec 28, 2007	13.12	13.12	12.99	13.01
603	NASDAQ	ATRC	Thu, Dec 27, 2007	13.27	13.38	13.00	13.00
602	NASDAQ	ATRC	Wed, Dec 26, 2007	13.59	14.00	13.36	13.59
601	NASDAQ	ATRC	Mon, Dec 24, 2007	13.11	13.85	13.06	13.48
600	NASDAQ	ATRC	Fri, Dec 21, 2007	13.17	13.44	12.58	12.91
599	NASDAQ	ATRC	Thu, Dec 20, 2007	12.61	13.19	12.61	13.17
598	NASDAQ	ATRC	Wed, Dec 19, 2007	12.16	12.60	12.08	12.60
597	NASDAQ	ATRC	Tue, Dec 18, 2007	11.49	12.64	11.35	12.00
596	NASDAQ	ATRC	Mon, Dec 17, 2007	11.11	11.50	11.11	11.39
595	NASDAQ	ATRC	Fri, Dec 14, 2007	11.38	11.53	11.10	11.29
594	NASDAQ	ATRC	Thu, Dec 13, 2007	11.30	11.51	11.25	11.33
593	NASDAQ	ATRC	Wed, Dec 12, 2007	11.36	11.42	11.27	11.41
592	NASDAQ	ATRC	Tue, Dec 11, 2007	10.77	11.39	10.77	11.39
591	NASDAQ	ATRC	Mon, Dec 10, 2007	11.85	11.88	10.86	10.96
590	NASDAQ	ATRC	Fri, Dec 7, 2007	11.51	11.76	11.50	11.71
589	NASDAQ	ATRC	Thu, Dec 6, 2007	11.57	11.72	11.50	11.57
588	NASDAQ	ATRC	Wed, Dec 5, 2007	11.43	11.95	11.43	11.65
587	NASDAQ	ATRC	Tue, Dec 4, 2007	11.22	11.43	11.03	11.30
586	NASDAQ	ATRC	Mon, Dec 3, 2007	11.34	11.50	10.72	11.49
585	NASDAQ	ATRC	Fri, Nov 30, 2007	11.07	11.54	11.07	11.49
584	NASDAQ	ATRC	Thu, Nov 29, 2007	10.99	11.17	10.74	11.15
583	NASDAQ	ATRC	Wed, Nov 28, 2007	11.20	11.25	10.45	11.00
582	NASDAQ	ATRC	Tue, Nov 27, 2007	11.18	11.18	11.05	11.07
581	NASDAQ	ATRC	Mon, Nov 26, 2007	11.00	11.18	10.95	11.00
580	NASDAQ	ATRC	Fri, Nov 23, 2007	10.98	10.98	10.98	10.98
579	NASDAQ	ATRC	Wed, Nov 21, 2007	11.10	11.10	10.84	10.88
578	NASDAQ	ATRC	Tue, Nov 20, 2007	10.95	11.10	10.70	10.97
577	NASDAQ	ATRC	Mon, Nov 19, 2007	10.65	10.76	10.60	10.73
576	NASDAQ	ATRC	Fri, Nov 16, 2007	11.18	11.74	10.56	10.57
575	NASDAQ	ATRC	Thu, Nov 15, 2007	11.59	11.75	11.15	11.40
574	NASDAQ	ATRC	Wed, Nov 14, 2007	11.31	11.95	11.31	11.86
573	NASDAQ	ATRC	Tue, Nov 13, 2007	11.20	11.35	11.20	11.25
572	NASDAQ	ATRC	Mon, Nov 12, 2007	11.35	11.45	11.12	11.25
571	NASDAQ	ATRC	Fri, Nov 9, 2007	11.50	11.75	11.37	11.44
570	NASDAQ	ATRC	Thu, Nov 8, 2007	11.61	11.62	11.50	11.56
569	NASDAQ	ATRC	Wed, Nov 7, 2007	11.40	11.62	11.40	11.56
568	NASDAQ	ATRC	Tue, Nov 6, 2007	11.62	11.62	11.43	11.55
567	NASDAQ	ATRC	Mon, Nov 5, 2007	11.23	11.62	11.20	11.55
566	NASDAQ	ATRC	Fri, Nov 2, 2007	11.30	11.61	11.00	11.10
565	NASDAQ	ATRC	Thu, Nov 1, 2007	11.22	11.47	11.12	11.30
564	NASDAQ	ATRC	Wed, Oct 31, 2007	11.49	11.62	11.35	11.38
563	NASDAQ	ATRC	Tue, Oct 30, 2007	11.45	11.47	11.35	11.37
562	NASDAQ	ATRC	Mon, Oct 29, 2007	11.41	11.50	11.35	11.39
561	NASDAQ	ATRC	Fri, Oct 26, 2007	11.41	11.58	11.26	11.35
560	NASDAQ	ATRC	Thu, Oct 25, 2007	11.52	11.75	11.24	11.24
559	NASDAQ	ATRC	Wed, Oct 24, 2007	11.52	11.52	11.40	11.44
558	NASDAQ	ATRC	Tue, Oct 23, 2007	11.17	11.66	11.02	11.41
557	NASDAQ	ATRC	Mon, Oct 22, 2007	11.11	11.22	10.90	10.98
556	NASDAQ	ATRC	Fri, Oct 19, 2007	10.98	11.17	10.95	10.96
555	NASDAQ	ATRC	Thu, Oct 18, 2007	11.10	11.21	10.95	11.08
554	NASDAQ	ATRC	Wed, Oct 17, 2007	10.92	11.10	10.81	11.08
553	NASDAQ	ATRC	Tue, Oct 16, 2007	10.80	10.99	10.76	10.80
552	NASDAQ	ATRC	Mon, Oct 15, 2007	10.90	11.00	10.64	10.90
551	NASDAQ	ATRC	Fri, Oct 12, 2007	10.75	10.96	10.55	10.84
550	NASDAQ	ATRC	Thu, Oct 11, 2007	10.72	11.00	10.71	10.77
549	NASDAQ	ATRC	Wed, Oct 10, 2007	10.86	10.95	10.51	10.71
548	NASDAQ	ATRC	Tue, Oct 9, 2007	10.79	10.99	10.60	10.93
547	NASDAQ	ATRC	Mon, Oct 8, 2007	10.88	10.88	10.65	10.79
546	NASDAQ	ATRC	Fri, Oct 5, 2007	10.85	10.85	10.74	10.81
545	NASDAQ	ATRC	Thu, Oct 4, 2007	10.92	11.00	10.76	10.88
544	NASDAQ	ATRC	Wed, Oct 3, 2007	10.80	11.00	10.73	10.80
543	NASDAQ	ATRC	Tue, Oct 2, 2007	10.73	10.99	10.66	10.78
542	NASDAQ	ATRC	Mon, Oct 1, 2007	10.58	10.82	10.49	10.80
541	NASDAQ	ATRC	Fri, Sep 28, 2007	10.65	10.77	10.50	10.64
540	NASDAQ	ATRC	Thu, Sep 27, 2007	10.41	10.70	10.19	10.54
539	NASDAQ	ATRC	Wed, Sep 26, 2007	10.53	10.79	10.32	10.32
538	NASDAQ	ATRC	Tue, Sep 25, 2007	10.73	10.79	10.44	10.46
537	NASDAQ	ATRC	Mon, Sep 24, 2007	10.69	10.80	10.57	10.66
536	NASDAQ	ATRC	Fri, Sep 21, 2007	10.58	10.80	10.57	10.69
535	NASDAQ	ATRC	Thu, Sep 20, 2007	10.38	10.75	10.20	10.57
534	NASDAQ	ATRC	Wed, Sep 19, 2007	10.31	10.52	10.10	10.43
533	NASDAQ	ATRC	Tue, Sep 18, 2007	10.23	10.45	10.07	10.25
532	NASDAQ	ATRC	Mon, Sep 17, 2007	10.62	10.74	10.29	10.30
531	NASDAQ	ATRC	Fri, Sep 14, 2007	10.78	10.78	10.28	10.69
530	NASDAQ	ATRC	Thu, Sep 13, 2007	10.76	11.01	10.75	10.77
529	NASDAQ	ATRC	Wed, Sep 12, 2007	10.75	11.16	10.66	10.82
528	NASDAQ	ATRC	Tue, Sep 11, 2007	10.83	11.18	10.70	10.83
527	NASDAQ	ATRC	Mon, Sep 10, 2007	10.76	10.90	10.54	10.71
526	NASDAQ	ATRC	Fri, Sep 7, 2007	11.00	11.12	10.88	10.90
525	NASDAQ	ATRC	Thu, Sep 6, 2007	10.80	11.00	10.80	10.98
524	NASDAQ	ATRC	Wed, Sep 5, 2007	10.90	11.00	10.66	10.81
523	NASDAQ	ATRC	Tue, Sep 4, 2007	10.51	10.92	10.25	10.88
522	NASDAQ	ATRC	Fri, Aug 31, 2007	10.68	10.81	10.51	10.51
521	NASDAQ	ATRC	Thu, Aug 30, 2007	10.76	10.87	10.62	10.65
520	NASDAQ	ATRC	Wed, Aug 29, 2007	10.73	10.91	10.73	10.91
519	NASDAQ	ATRC	Tue, Aug 28, 2007	10.79	10.85	10.64	10.80
518	NASDAQ	ATRC	Mon, Aug 27, 2007	10.76	10.89	10.76	10.83
517	NASDAQ	ATRC	Fri, Aug 24, 2007	10.73	10.89	10.73	10.77
516	NASDAQ	ATRC	Thu, Aug 23, 2007	10.40	10.87	10.36	10.75
515	NASDAQ	ATRC	Wed, Aug 22, 2007	10.30	10.40	10.24	10.40
514	NASDAQ	ATRC	Tue, Aug 21, 2007	10.25	10.37	10.17	10.30
513	NASDAQ	ATRC	Mon, Aug 20, 2007	10.23	10.46	10.15	10.25
512	NASDAQ	ATRC	Fri, Aug 17, 2007	10.01	10.30	10.01	10.26
511	NASDAQ	ATRC	Thu, Aug 16, 2007	10.11	10.11	10.04	10.08
510	NASDAQ	ATRC	Wed, Aug 15, 2007	10.49	10.55	10.00	10.16
509	NASDAQ	ATRC	Tue, Aug 14, 2007	10.42	10.55	10.42	10.49
508	NASDAQ	ATRC	Mon, Aug 13, 2007	10.66	10.66	10.02	10.53
507	NASDAQ	ATRC	Fri, Aug 10, 2007	10.10	10.30	10.10	10.15
506	NASDAQ	ATRC	Thu, Aug 9, 2007	9.62	10.05	9.62	10.03
505	NASDAQ	ATRC	Wed, Aug 8, 2007	9.60	9.97	9.60	9.93
504	NASDAQ	ATRC	Tue, Aug 7, 2007	9.42	9.93	9.35	9.64
503	NASDAQ	ATRC	Mon, Aug 6, 2007	9.36	9.49	9.35	9.48
502	NASDAQ	ATRC	Fri, Aug 3, 2007	9.83	9.95	9.48	9.49
501	NASDAQ	ATRC	Thu, Aug 2, 2007	9.78	9.84	9.48	9.78
500	NASDAQ	ATRC	Wed, Aug 1, 2007	9.83	9.84	9.60	9.80
499	NASDAQ	ATRC	Tue, Jul 31, 2007	9.64	9.75	9.50	9.75
498	NASDAQ	ATRC	Mon, Jul 30, 2007	9.45	9.64	9.27	9.64
497	NASDAQ	ATRC	Fri, Jul 27, 2007	9.19	9.78	9.19	9.63
496	NASDAQ	ATRC	Thu, Jul 26, 2007	9.56	10.00	9.26	9.30
495	NASDAQ	ATRC	Wed, Jul 25, 2007	9.85	9.85	9.42	9.50
494	NASDAQ	ATRC	Tue, Jul 24, 2007	9.66	9.86	9.50	9.61
493	NASDAQ	ATRC	Mon, Jul 23, 2007	9.28	9.88	9.19	9.78
492	NASDAQ	ATRC	Fri, Jul 20, 2007	9.20	9.20	9.06	9.20
491	NASDAQ	ATRC	Thu, Jul 19, 2007	9.10	9.37	8.79	9.25
490	NASDAQ	ATRC	Wed, Jul 18, 2007	9.27	9.27	8.93	9.00
489	NASDAQ	ATRC	Tue, Jul 17, 2007	9.56	9.61	9.17	9.43
488	NASDAQ	ATRC	Mon, Jul 16, 2007	9.38	9.52	9.29	9.37
487	NASDAQ	ATRC	Fri, Jul 13, 2007	9.35	9.39	9.12	9.30
486	NASDAQ	ATRC	Thu, Jul 12, 2007	9.31	9.42	8.96	9.38
485	NASDAQ	ATRC	Wed, Jul 11, 2007	9.47	9.67	9.22	9.23
484	NASDAQ	ATRC	Tue, Jul 10, 2007	9.00	9.49	8.82	9.34
483	NASDAQ	ATRC	Mon, Jul 9, 2007	8.77	9.01	8.77	9.01
482	NASDAQ	ATRC	Fri, Jul 6, 2007	8.47	8.95	8.16	8.84
481	NASDAQ	ATRC	Thu, Jul 5, 2007	8.40	8.84	8.32	8.60
480	NASDAQ	ATRC	Tue, Jul 3, 2007	8.63	8.63	8.44	8.48
479	NASDAQ	ATRC	Mon, Jul 2, 2007	8.74	8.74	8.40	8.56
478	NASDAQ	ATRC	Fri, Jun 29, 2007	8.66	8.67	8.45	8.54
477	NASDAQ	ATRC	Thu, Jun 28, 2007	8.66	8.74	8.55	8.70
476	NASDAQ	ATRC	Wed, Jun 27, 2007	8.41	8.71	8.26	8.62
475	NASDAQ	ATRC	Tue, Jun 26, 2007	9.10	9.11	8.39	8.44
474	NASDAQ	ATRC	Mon, Jun 25, 2007	9.10	9.15	9.01	9.10
473	NASDAQ	ATRC	Fri, Jun 22, 2007	9.32	9.35	9.07	9.08
472	NASDAQ	ATRC	Thu, Jun 21, 2007	9.41	9.52	9.32	9.35
471	NASDAQ	ATRC	Wed, Jun 20, 2007	9.63	9.79	9.46	9.50
470	NASDAQ	ATRC	Tue, Jun 19, 2007	9.84	9.84	9.75	9.79
469	NASDAQ	ATRC	Mon, Jun 18, 2007	9.94	9.96	9.70	9.85
468	NASDAQ	ATRC	Fri, Jun 15, 2007	10.06	10.08	9.90	10.00
467	NASDAQ	ATRC	Thu, Jun 14, 2007	10.36	10.37	10.01	10.07
466	NASDAQ	ATRC	Wed, Jun 13, 2007	10.02	10.15	10.01	10.10
465	NASDAQ	ATRC	Tue, Jun 12, 2007	10.20	10.20	9.97	10.05
464	NASDAQ	ATRC	Mon, Jun 11, 2007	10.02	10.23	9.91	10.07
463	NASDAQ	ATRC	Fri, Jun 8, 2007	10.05	10.23	9.99	10.02
462	NASDAQ	ATRC	Thu, Jun 7, 2007	9.85	10.08	9.85	10.01
461	NASDAQ	ATRC	Wed, Jun 6, 2007	9.70	9.89	9.70	9.81
460	NASDAQ	ATRC	Tue, Jun 5, 2007	9.86	9.94	9.73	9.90
459	NASDAQ	ATRC	Mon, Jun 4, 2007	9.85	9.89	9.85	9.86
458	NASDAQ	ATRC	Fri, Jun 1, 2007	9.70	9.98	9.70	9.85
457	NASDAQ	ATRC	Thu, May 31, 2007	9.65	9.95	9.65	9.90
456	NASDAQ	ATRC	Wed, May 30, 2007	9.61	9.86	9.61	9.81
455	NASDAQ	ATRC	Tue, May 29, 2007	9.70	9.81	9.52	9.80
454	NASDAQ	ATRC	Fri, May 25, 2007	9.75	9.80	9.59	9.71
453	NASDAQ	ATRC	Thu, May 24, 2007	10.22	10.41	9.58	9.62
452	NASDAQ	ATRC	Wed, May 23, 2007	9.98	10.50	9.98	10.42
451	NASDAQ	ATRC	Tue, May 22, 2007	10.02	10.16	9.98	9.98
450	NASDAQ	ATRC	Mon, May 21, 2007	10.10	10.22	10.02	10.02
449	NASDAQ	ATRC	Fri, May 18, 2007	10.22	10.22	10.05	10.06
448	NASDAQ	ATRC	Thu, May 17, 2007	10.61	10.61	10.08	10.08
447	NASDAQ	ATRC	Wed, May 16, 2007	10.78	10.88	10.49	10.70
446	NASDAQ	ATRC	Tue, May 15, 2007	10.76	10.94	10.69	10.74
445	NASDAQ	ATRC	Mon, May 14, 2007	10.63	10.89	10.52	10.84
444	NASDAQ	ATRC	Fri, May 11, 2007	10.99	11.00	10.40	10.55
443	NASDAQ	ATRC	Thu, May 10, 2007	11.00	11.05	10.89	10.92
442	NASDAQ	ATRC	Wed, May 9, 2007	11.49	11.49	10.99	10.99
441	NASDAQ	ATRC	Tue, May 8, 2007	11.59	11.72	11.45	11.48
440	NASDAQ	ATRC	Mon, May 7, 2007	11.55	11.73	11.41	11.67
439	NASDAQ	ATRC	Fri, May 4, 2007	11.01	11.56	10.99	11.55
438	NASDAQ	ATRC	Thu, May 3, 2007	10.98	11.05	10.98	11.03
437	NASDAQ	ATRC	Wed, May 2, 2007	11.05	11.05	10.98	11.00
436	NASDAQ	ATRC	Tue, May 1, 2007	11.16	11.16	10.91	11.00
435	NASDAQ	ATRC	Mon, Apr 30, 2007	11.49	11.49	10.95	11.19
434	NASDAQ	ATRC	Fri, Apr 27, 2007	11.26	11.51	11.26	11.51
433	NASDAQ	ATRC	Thu, Apr 26, 2007	11.50	11.55	11.41	11.48
432	NASDAQ	ATRC	Wed, Apr 25, 2007	11.20	11.42	10.64	11.38
431	NASDAQ	ATRC	Tue, Apr 24, 2007	11.30	11.60	11.30	11.60
430	NASDAQ	ATRC	Mon, Apr 23, 2007	11.30	11.30	11.13	11.26
429	NASDAQ	ATRC	Fri, Apr 20, 2007	10.35	11.44	10.35	11.24
428	NASDAQ	ATRC	Thu, Apr 19, 2007	10.40	10.58	10.40	10.47
427	NASDAQ	ATRC	Wed, Apr 18, 2007	10.30	10.31	10.25	10.25
426	NASDAQ	ATRC	Tue, Apr 17, 2007	10.50	10.64	10.21	10.41
425	NASDAQ	ATRC	Mon, Apr 16, 2007	10.52	10.75	10.30	10.51
424	NASDAQ	ATRC	Fri, Apr 13, 2007	10.40	10.49	9.91	10.45
423	NASDAQ	ATRC	Thu, Apr 12, 2007	9.96	10.11	9.89	10.11
422	NASDAQ	ATRC	Wed, Apr 11, 2007	9.77	10.07	9.77	10.05
421	NASDAQ	ATRC	Tue, Apr 10, 2007	10.14	10.14	10.03	10.03
420	NASDAQ	ATRC	Mon, Apr 9, 2007	10.14	10.29	10.00	10.13
419	NASDAQ	ATRC	Thu, Apr 5, 2007	9.97	10.31	9.91	10.26
418	NASDAQ	ATRC	Wed, Apr 4, 2007	9.91	9.97	9.64	9.97
417	NASDAQ	ATRC	Tue, Apr 3, 2007	9.99	10.00	9.87	9.88
416	NASDAQ	ATRC	Mon, Apr 2, 2007	10.13	10.13	9.93	10.00
415	NASDAQ	ATRC	Fri, Mar 30, 2007	10.43	10.43	10.01	10.21
414	NASDAQ	ATRC	Thu, Mar 29, 2007	10.61	10.61	9.61	10.10
413	NASDAQ	ATRC	Wed, Mar 28, 2007	10.52	10.78	10.52	10.70
412	NASDAQ	ATRC	Tue, Mar 27, 2007	11.09	11.09	10.45	10.48
411	NASDAQ	ATRC	Mon, Mar 26, 2007	10.97	11.03	10.86	11.03
410	NASDAQ	ATRC	Fri, Mar 23, 2007	10.82	11.19	10.64	10.95
409	NASDAQ	ATRC	Thu, Mar 22, 2007	10.85	10.85	10.46	10.71
408	NASDAQ	ATRC	Wed, Mar 21, 2007	11.06	11.25	10.77	10.87
407	NASDAQ	ATRC	Tue, Mar 20, 2007	11.41	11.41	11.12	11.15
406	NASDAQ	ATRC	Mon, Mar 19, 2007	11.37	11.88	11.29	11.50
405	NASDAQ	ATRC	Fri, Mar 16, 2007	10.99	11.45	10.98	11.25
404	NASDAQ	ATRC	Thu, Mar 15, 2007	10.90	11.00	10.82	10.96
403	NASDAQ	ATRC	Wed, Mar 14, 2007	11.00	11.00	10.82	10.83
402	NASDAQ	ATRC	Tue, Mar 13, 2007	10.96	11.12	10.34	11.00
401	NASDAQ	ATRC	Mon, Mar 12, 2007	11.17	11.17	11.00	11.15
400	NASDAQ	ATRC	Fri, Mar 9, 2007	10.99	11.24	10.99	11.19
399	NASDAQ	ATRC	Thu, Mar 8, 2007	10.74	11.03	10.74	10.96
398	NASDAQ	ATRC	Wed, Mar 7, 2007	10.84	10.95	10.74	10.85
397	NASDAQ	ATRC	Tue, Mar 6, 2007	10.70	10.88	10.70	10.79
396	NASDAQ	ATRC	Mon, Mar 5, 2007	10.61	10.68	10.57	10.68
395	NASDAQ	ATRC	Fri, Mar 2, 2007	10.60	10.68	10.50	10.68
394	NASDAQ	ATRC	Thu, Mar 1, 2007	10.24	10.54	10.19	10.53
393	NASDAQ	ATRC	Wed, Feb 28, 2007	10.22	10.25	9.86	10.11
392	NASDAQ	ATRC	Tue, Feb 27, 2007	10.67	10.86	10.22	10.50
391	NASDAQ	ATRC	Mon, Feb 26, 2007	10.70	10.95	10.64	10.95
390	NASDAQ	ATRC	Fri, Feb 23, 2007	11.27	11.27	10.77	10.80
389	NASDAQ	ATRC	Thu, Feb 22, 2007	11.97	11.97	11.26	11.27
388	NASDAQ	ATRC	Wed, Feb 21, 2007	12.49	12.49	11.62	12.02
387	NASDAQ	ATRC	Tue, Feb 20, 2007	12.02	12.50	12.02	12.35
386	NASDAQ	ATRC	Fri, Feb 16, 2007	12.50	12.75	11.79	11.99
385	NASDAQ	ATRC	Thu, Feb 15, 2007	13.25	13.25	12.84	12.84
384	NASDAQ	ATRC	Wed, Feb 14, 2007	13.00	13.20	12.89	13.14
383	NASDAQ	ATRC	Tue, Feb 13, 2007	12.56	13.50	12.53	12.85
382	NASDAQ	ATRC	Mon, Feb 12, 2007	11.91	12.55	11.82	12.47
381	NASDAQ	ATRC	Fri, Feb 9, 2007	12.21	12.21	11.81	12.00
380	NASDAQ	ATRC	Thu, Feb 8, 2007	12.19	12.36	12.17	12.22
379	NASDAQ	ATRC	Wed, Feb 7, 2007	11.82	12.45	11.82	12.30
378	NASDAQ	ATRC	Tue, Feb 6, 2007	12.00	12.00	11.77	11.93
377	NASDAQ	ATRC	Mon, Feb 5, 2007	12.00	12.00	11.82	11.94
376	NASDAQ	ATRC	Fri, Feb 2, 2007	10.74	12.29	10.69	11.68
375	NASDAQ	ATRC	Thu, Feb 1, 2007	10.59	10.65	10.30	10.48
374	NASDAQ	ATRC	Wed, Jan 31, 2007	9.89	10.84	9.89	10.50
373	NASDAQ	ATRC	Tue, Jan 30, 2007	9.54	10.00	9.45	9.91
372	NASDAQ	ATRC	Mon, Jan 29, 2007	9.45	9.69	9.45	9.55
371	NASDAQ	ATRC	Fri, Jan 26, 2007	9.20	9.60	9.20	9.50
370	NASDAQ	ATRC	Thu, Jan 25, 2007	9.20	9.22	9.11	9.17
369	NASDAQ	ATRC	Wed, Jan 24, 2007	9.60	9.60	9.15	9.26
368	NASDAQ	ATRC	Tue, Jan 23, 2007	9.61	9.61	9.41	9.60
367	NASDAQ	ATRC	Mon, Jan 22, 2007	9.60	9.76	9.60	9.66
366	NASDAQ	ATRC	Fri, Jan 19, 2007	10.00	10.00	9.41	9.85
365	NASDAQ	ATRC	Thu, Jan 18, 2007	9.82	9.92	9.80	9.90
364	NASDAQ	ATRC	Wed, Jan 17, 2007	9.95	9.95	9.80	9.80
363	NASDAQ	ATRC	Tue, Jan 16, 2007	9.94	9.95	9.87	9.90
362	NASDAQ	ATRC	Fri, Jan 12, 2007	9.90	9.93	9.82	9.93
361	NASDAQ	ATRC	Thu, Jan 11, 2007	9.99	10.08	9.81	9.93
360	NASDAQ	ATRC	Wed, Jan 10, 2007	9.59	10.09	9.59	10.06
359	NASDAQ	ATRC	Tue, Jan 9, 2007	9.47	9.58	9.44	9.46
358	NASDAQ	ATRC	Mon, Jan 8, 2007	9.75	9.75	9.46	9.46
357	NASDAQ	ATRC	Fri, Jan 5, 2007	9.16	9.79	9.16	9.70
356	NASDAQ	ATRC	Thu, Jan 4, 2007	9.10	9.14	8.86	9.14
355	NASDAQ	ATRC	Wed, Jan 3, 2007	9.09	9.43	8.89	9.15
354	NASDAQ	ATRC	Fri, Dec 29, 2006	8.80	9.32	8.75	8.94
353	NASDAQ	ATRC	Thu, Dec 28, 2006	9.23	9.29	8.85	8.97
352	NASDAQ	ATRC	Wed, Dec 27, 2006	8.90	9.44	8.89	9.38
351	NASDAQ	ATRC	Tue, Dec 26, 2006	9.15	9.36	9.00	9.01
350	NASDAQ	ATRC	Fri, Dec 22, 2006	8.92	9.61	8.88	9.36
349	NASDAQ	ATRC	Thu, Dec 21, 2006	8.80	9.06	8.79	9.02
348	NASDAQ	ATRC	Wed, Dec 20, 2006	8.61	8.71	8.35	8.71
347	NASDAQ	ATRC	Tue, Dec 19, 2006	8.58	8.61	8.46	8.55
346	NASDAQ	ATRC	Mon, Dec 18, 2006	9.06	9.06	8.43	8.70
345	NASDAQ	ATRC	Fri, Dec 15, 2006	9.39	9.39	9.10	9.11
344	NASDAQ	ATRC	Thu, Dec 14, 2006	9.44	9.50	9.19	9.30
343	NASDAQ	ATRC	Wed, Dec 13, 2006	9.38	9.53	9.25	9.53
342	NASDAQ	ATRC	Tue, Dec 12, 2006	9.50	9.58	9.20	9.58
341	NASDAQ	ATRC	Mon, Dec 11, 2006	9.41	9.60	9.30	9.51
340	NASDAQ	ATRC	Fri, Dec 8, 2006	9.45	9.61	9.32	9.55
339	NASDAQ	ATRC	Thu, Dec 7, 2006	9.70	9.70	9.25	9.65
338	NASDAQ	ATRC	Wed, Dec 6, 2006	10.54	10.54	9.53	9.70
337	NASDAQ	ATRC	Tue, Dec 5, 2006	10.90	10.90	10.45	10.45
336	NASDAQ	ATRC	Mon, Dec 4, 2006	10.54	11.01	10.54	10.86
335	NASDAQ	ATRC	Fri, Dec 1, 2006	10.15	10.55	10.15	10.55
334	NASDAQ	ATRC	Thu, Nov 30, 2006	9.85	10.00	9.75	10.00
333	NASDAQ	ATRC	Wed, Nov 29, 2006	9.53	9.74	9.53	9.66
332	NASDAQ	ATRC	Tue, Nov 28, 2006	9.47	9.60	9.47	9.53
331	NASDAQ	ATRC	Mon, Nov 27, 2006	9.10	9.72	9.10	9.47
330	NASDAQ	ATRC	Fri, Nov 24, 2006	8.55	9.00	8.55	8.90
329	NASDAQ	ATRC	Wed, Nov 22, 2006	8.42	8.57	8.32	8.50
328	NASDAQ	ATRC	Tue, Nov 21, 2006	8.28	8.39	8.28	8.34
327	NASDAQ	ATRC	Mon, Nov 20, 2006	8.20	8.35	8.16	8.35
326	NASDAQ	ATRC	Fri, Nov 17, 2006	8.15	8.21	8.12	8.21
325	NASDAQ	ATRC	Thu, Nov 16, 2006	8.34	8.34	8.04	8.10
324	NASDAQ	ATRC	Wed, Nov 15, 2006	8.35	8.35	8.28	8.35
323	NASDAQ	ATRC	Tue, Nov 14, 2006	8.30	8.35	8.27	8.35
322	NASDAQ	ATRC	Mon, Nov 13, 2006	8.50	8.69	8.28	8.34
321	NASDAQ	ATRC	Fri, Nov 10, 2006	8.37	8.58	8.33	8.50
320	NASDAQ	ATRC	Thu, Nov 9, 2006	8.20	8.37	8.11	8.37
319	NASDAQ	ATRC	Wed, Nov 8, 2006	8.03	8.26	8.03	8.05
318	NASDAQ	ATRC	Tue, Nov 7, 2006	8.40	8.40	8.30	8.32
317	NASDAQ	ATRC	Mon, Nov 6, 2006	8.39	8.40	8.18	8.35
316	NASDAQ	ATRC	Fri, Nov 3, 2006	8.01	8.02	8.00	8.02
315	NASDAQ	ATRC	Thu, Nov 2, 2006	8.15	8.15	7.98	8.03
314	NASDAQ	ATRC	Wed, Nov 1, 2006	8.10	8.40	8.00	8.15
313	NASDAQ	ATRC	Tue, Oct 31, 2006	8.00	8.09	8.00	8.03
312	NASDAQ	ATRC	Mon, Oct 30, 2006	7.92	8.01	7.90	8.01
311	NASDAQ	ATRC	Fri, Oct 27, 2006	7.91	8.30	7.70	7.90
310	NASDAQ	ATRC	Thu, Oct 26, 2006	8.06	8.31	7.80	7.99
309	NASDAQ	ATRC	Wed, Oct 25, 2006	7.84	8.20	7.75	7.82
308	NASDAQ	ATRC	Tue, Oct 24, 2006	7.84	8.25	7.75	7.77
307	NASDAQ	ATRC	Mon, Oct 23, 2006	7.89	7.93	7.61	7.85
306	NASDAQ	ATRC	Fri, Oct 20, 2006	8.00	8.08	7.91	7.97
305	NASDAQ	ATRC	Thu, Oct 19, 2006	7.95	8.27	7.91	8.10
304	NASDAQ	ATRC	Wed, Oct 18, 2006	8.18	8.18	7.95	8.16
303	NASDAQ	ATRC	Tue, Oct 17, 2006	8.30	8.40	8.08	8.32
302	NASDAQ	ATRC	Mon, Oct 16, 2006	7.85	8.44	7.85	8.30
301	NASDAQ	ATRC	Fri, Oct 13, 2006	7.70	7.80	7.54	7.71
300	NASDAQ	ATRC	Thu, Oct 12, 2006	7.41	7.72	7.41	7.65
299	NASDAQ	ATRC	Wed, Oct 11, 2006	7.25	7.49	7.16	7.49
298	NASDAQ	ATRC	Tue, Oct 10, 2006	7.12	7.30	7.12	7.25
297	NASDAQ	ATRC	Mon, Oct 9, 2006	7.46	7.55	7.37	7.50
296	NASDAQ	ATRC	Fri, Oct 6, 2006	6.91	7.52	6.90	7.33
295	NASDAQ	ATRC	Thu, Oct 5, 2006	7.50	7.53	7.20	7.40
294	NASDAQ	ATRC	Wed, Oct 4, 2006	7.33	7.47	7.30	7.34
293	NASDAQ	ATRC	Tue, Oct 3, 2006	6.91	7.37	6.91	7.15
292	NASDAQ	ATRC	Mon, Oct 2, 2006	6.77	7.03	6.57	6.85
291	NASDAQ	ATRC	Fri, Sep 29, 2006	6.80	6.83	6.59	6.83
290	NASDAQ	ATRC	Thu, Sep 28, 2006	6.50	6.66	6.50	6.61
289	NASDAQ	ATRC	Wed, Sep 27, 2006	7.03	7.03	6.31	6.47
288	NASDAQ	ATRC	Tue, Sep 26, 2006	6.95	7.00	6.67	6.81
287	NASDAQ	ATRC	Mon, Sep 25, 2006	6.98	7.20	6.74	6.95
286	NASDAQ	ATRC	Fri, Sep 22, 2006	6.74	7.02	6.74	6.95
285	NASDAQ	ATRC	Thu, Sep 21, 2006	6.88	6.88	6.88	6.88
284	NASDAQ	ATRC	Wed, Sep 20, 2006	7.00	7.00	6.70	6.75
283	NASDAQ	ATRC	Tue, Sep 19, 2006	6.75	6.89	6.75	6.84
282	NASDAQ	ATRC	Mon, Sep 18, 2006	6.86	7.02	6.68	6.73
281	NASDAQ	ATRC	Fri, Sep 15, 2006	6.89	7.04	6.85	7.02
280	NASDAQ	ATRC	Thu, Sep 14, 2006	7.03	7.03	6.86	6.86
279	NASDAQ	ATRC	Wed, Sep 13, 2006	6.70	7.28	6.50	6.99
278	NASDAQ	ATRC	Tue, Sep 12, 2006	6.62	6.70	6.06	6.51
277	NASDAQ	ATRC	Mon, Sep 11, 2006	6.59	6.75	6.54	6.61
276	NASDAQ	ATRC	Fri, Sep 8, 2006	6.32	6.57	6.32	6.55
275	NASDAQ	ATRC	Thu, Sep 7, 2006	6.32	6.40	6.25	6.27
274	NASDAQ	ATRC	Wed, Sep 6, 2006	6.03	6.60	6.03	6.34
273	NASDAQ	ATRC	Tue, Sep 5, 2006	6.11	6.23	6.00	6.12
272	NASDAQ	ATRC	Fri, Sep 1, 2006	5.85	6.30	5.85	5.99
271	NASDAQ	ATRC	Thu, Aug 31, 2006	6.00	6.27	5.80	5.95
270	NASDAQ	ATRC	Wed, Aug 30, 2006	6.03	6.10	5.96	6.01
269	NASDAQ	ATRC	Tue, Aug 29, 2006	5.76	6.36	5.63	6.00
268	NASDAQ	ATRC	Mon, Aug 28, 2006	5.95	5.95	5.94	5.94
267	NASDAQ	ATRC	Fri, Aug 25, 2006	6.00	6.08	5.60	6.00
266	NASDAQ	ATRC	Thu, Aug 24, 2006	5.74	6.33	5.74	6.10
265	NASDAQ	ATRC	Wed, Aug 23, 2006	5.96	5.96	5.68	5.68
264	NASDAQ	ATRC	Tue, Aug 22, 2006	5.95	6.19	5.50	6.00
263	NASDAQ	ATRC	Mon, Aug 21, 2006	6.13	6.27	5.75	5.96
262	NASDAQ	ATRC	Fri, Aug 18, 2006	6.31	6.31	6.09	6.21
261	NASDAQ	ATRC	Thu, Aug 17, 2006	6.20	6.20	6.00	6.00
260	NASDAQ	ATRC	Wed, Aug 16, 2006	6.21	6.26	6.12	6.20
259	NASDAQ	ATRC	Tue, Aug 15, 2006	6.17	6.20	6.17	6.19
258	NASDAQ	ATRC	Mon, Aug 14, 2006	5.45	6.16	5.41	6.01
257	NASDAQ	ATRC	Fri, Aug 11, 2006	5.65	5.73	5.44	5.44
256	NASDAQ	ATRC	Thu, Aug 10, 2006	6.00	6.00	5.68	5.68
255	NASDAQ	ATRC	Wed, Aug 9, 2006	6.60	6.60	5.66	5.89
254	NASDAQ	ATRC	Tue, Aug 8, 2006	5.97	6.00	5.80	5.80
253	NASDAQ	ATRC	Mon, Aug 7, 2006	6.40	6.40	5.81	6.09
252	NASDAQ	ATRC	Fri, Aug 4, 2006	6.16	6.47	5.81	6.40
251	NASDAQ	ATRC	Thu, Aug 3, 2006	6.00	6.00	5.99	6.00
250	NASDAQ	ATRC	Wed, Aug 2, 2006	6.00	6.00	5.82	5.91
249	NASDAQ	ATRC	Tue, Aug 1, 2006	6.01	6.14	5.85	5.86
248	NASDAQ	ATRC	Mon, Jul 31, 2006	6.15	6.15	5.90	5.96
247	NASDAQ	ATRC	Fri, Jul 28, 2006	6.06	6.10	5.95	6.04
246	NASDAQ	ATRC	Thu, Jul 27, 2006	6.04	6.04	5.89	5.91
245	NASDAQ	ATRC	Wed, Jul 26, 2006	5.80	5.99	5.80	5.90
244	NASDAQ	ATRC	Tue, Jul 25, 2006	5.88	5.88	5.75	5.80
243	NASDAQ	ATRC	Mon, Jul 24, 2006	6.10	6.10	4.91	5.65
242	NASDAQ	ATRC	Fri, Jul 21, 2006	6.12	6.15	6.05	6.14
241	NASDAQ	ATRC	Thu, Jul 20, 2006	6.99	7.14	5.90	6.00
240	NASDAQ	ATRC	Wed, Jul 19, 2006	7.00	7.00	7.00	7.00
239	NASDAQ	ATRC	Tue, Jul 18, 2006	7.34	7.35	6.89	6.90
238	NASDAQ	ATRC	Mon, Jul 17, 2006	7.34	7.35	7.33	7.34
237	NASDAQ	ATRC	Fri, Jul 14, 2006	7.30	7.34	7.30	7.30
236	NASDAQ	ATRC	Thu, Jul 13, 2006	6.90	7.33	6.90	7.32
235	NASDAQ	ATRC	Wed, Jul 12, 2006	7.12	7.25	6.90	6.96
234	NASDAQ	ATRC	Tue, Jul 11, 2006	7.39	7.39	7.05	7.05
233	NASDAQ	ATRC	Mon, Jul 10, 2006	7.74	7.76	7.41	7.47
232	NASDAQ	ATRC	Fri, Jul 7, 2006	7.45	7.75	7.35	7.61
231	NASDAQ	ATRC	Thu, Jul 6, 2006	7.15	7.50	7.15	7.29
230	NASDAQ	ATRC	Wed, Jul 5, 2006	6.95	7.15	6.95	7.15
229	NASDAQ	ATRC	Mon, Jul 3, 2006	7.50	7.50	7.12	7.12
228	NASDAQ	ATRC	Fri, Jun 30, 2006	7.15	7.64	7.15	7.52
227	NASDAQ	ATRC	Thu, Jun 29, 2006	7.10	7.16	6.80	7.04
226	NASDAQ	ATRC	Wed, Jun 28, 2006	7.20	7.20	7.00	7.15
225	NASDAQ	ATRC	Tue, Jun 27, 2006	7.87	7.88	7.00	7.30
224	NASDAQ	ATRC	Mon, Jun 26, 2006	7.81	8.25	7.70	7.90
223	NASDAQ	ATRC	Fri, Jun 23, 2006	8.17	8.17	7.84	7.89
222	NASDAQ	ATRC	Thu, Jun 22, 2006	7.90	8.16	7.05	8.16
221	NASDAQ	ATRC	Wed, Jun 21, 2006	8.32	8.35	7.95	7.99
220	NASDAQ	ATRC	Tue, Jun 20, 2006	8.48	8.48	8.11	8.25
219	NASDAQ	ATRC	Mon, Jun 19, 2006	8.39	8.39	8.15	8.29
218	NASDAQ	ATRC	Fri, Jun 16, 2006	9.11	9.16	8.06	8.60
217	NASDAQ	ATRC	Thu, Jun 15, 2006	8.70	9.05	8.63	9.01
216	NASDAQ	ATRC	Wed, Jun 14, 2006	7.72	8.70	7.72	8.70
215	NASDAQ	ATRC	Tue, Jun 13, 2006	7.49	7.60	7.49	7.60
214	NASDAQ	ATRC	Mon, Jun 12, 2006	7.59	7.64	7.59	7.60
213	NASDAQ	ATRC	Fri, Jun 9, 2006	7.99	7.99	7.79	7.86
212	NASDAQ	ATRC	Thu, Jun 8, 2006	7.89	8.00	7.30	8.00
211	NASDAQ	ATRC	Wed, Jun 7, 2006	7.03	7.82	6.91	7.82
210	NASDAQ	ATRC	Tue, Jun 6, 2006	7.33	7.33	6.99	7.10
209	NASDAQ	ATRC	Mon, Jun 5, 2006	7.24	7.35	7.17	7.18
208	NASDAQ	ATRC	Fri, Jun 2, 2006	7.02	7.40	7.01	7.32
207	NASDAQ	ATRC	Thu, Jun 1, 2006	7.14	7.19	7.00	7.15
206	NASDAQ	ATRC	Wed, May 31, 2006	7.33	7.34	6.90	7.03
205	NASDAQ	ATRC	Tue, May 30, 2006	7.56	7.56	7.34	7.34
204	NASDAQ	ATRC	Fri, May 26, 2006	7.59	7.73	7.37	7.56
203	NASDAQ	ATRC	Thu, May 25, 2006	7.36	7.60	7.20	7.60
202	NASDAQ	ATRC	Wed, May 24, 2006	6.95	7.41	6.90	7.36
201	NASDAQ	ATRC	Tue, May 23, 2006	7.00	7.15	7.00	7.14
200	NASDAQ	ATRC	Mon, May 22, 2006	6.98	6.98	6.62	6.94
199	NASDAQ	ATRC	Fri, May 19, 2006	7.38	7.49	7.32	7.32
198	NASDAQ	ATRC	Thu, May 18, 2006	8.00	8.00	7.35	7.41
197	NASDAQ	ATRC	Wed, May 17, 2006	7.38	8.09	7.36	8.01
196	NASDAQ	ATRC	Tue, May 16, 2006	7.71	7.72	7.64	7.72
195	NASDAQ	ATRC	Mon, May 15, 2006	7.94	8.06	7.38	8.04
194	NASDAQ	ATRC	Fri, May 12, 2006	8.22	8.38	7.88	8.00
193	NASDAQ	ATRC	Thu, May 11, 2006	7.98	8.35	7.98	8.20
192	NASDAQ	ATRC	Wed, May 10, 2006	8.15	8.19	7.82	8.02
191	NASDAQ	ATRC	Tue, May 9, 2006	8.07	8.55	7.70	8.20
190	NASDAQ	ATRC	Mon, May 8, 2006	8.35	8.45	8.00	8.01
189	NASDAQ	ATRC	Fri, May 5, 2006	8.65	8.66	8.26	8.26
188	NASDAQ	ATRC	Thu, May 4, 2006	8.70	8.95	8.02	8.15
187	NASDAQ	ATRC	Wed, May 3, 2006	8.31	8.70	8.30	8.50
186	NASDAQ	ATRC	Tue, May 2, 2006	8.46	8.51	8.26	8.30
185	NASDAQ	ATRC	Mon, May 1, 2006	8.50	8.90	8.40	8.45
184	NASDAQ	ATRC	Fri, Apr 28, 2006	8.60	8.60	8.32	8.50
183	NASDAQ	ATRC	Thu, Apr 27, 2006	8.61	8.64	8.30	8.44
182	NASDAQ	ATRC	Wed, Apr 26, 2006	8.60	8.68	8.50	8.68
181	NASDAQ	ATRC	Tue, Apr 25, 2006	8.69	8.69	8.40	8.60
180	NASDAQ	ATRC	Mon, Apr 24, 2006	8.79	8.79	8.47	8.51
179	NASDAQ	ATRC	Fri, Apr 21, 2006	8.90	8.90	8.75	8.75
178	NASDAQ	ATRC	Thu, Apr 20, 2006	8.94	9.11	8.94	8.94
177	NASDAQ	ATRC	Wed, Apr 19, 2006	8.87	9.00	8.66	8.90
176	NASDAQ	ATRC	Tue, Apr 18, 2006	9.03	9.18	8.51	8.69
175	NASDAQ	ATRC	Mon, Apr 17, 2006	9.24	9.27	8.89	9.02
174	NASDAQ	ATRC	Thu, Apr 13, 2006	9.39	9.39	8.73	8.99
173	NASDAQ	ATRC	Wed, Apr 12, 2006	8.92	9.50	8.68	9.10
172	NASDAQ	ATRC	Tue, Apr 11, 2006	8.81	8.91	8.45	8.82
171	NASDAQ	ATRC	Mon, Apr 10, 2006	9.68	9.68	8.86	8.90
170	NASDAQ	ATRC	Fri, Apr 7, 2006	9.47	9.70	9.01	9.04
169	NASDAQ	ATRC	Thu, Apr 6, 2006	8.59	9.40	8.59	9.37
168	NASDAQ	ATRC	Wed, Apr 5, 2006	8.85	8.94	8.60	8.86
167	NASDAQ	ATRC	Tue, Apr 4, 2006	8.25	8.65	8.01	8.64
166	NASDAQ	ATRC	Mon, Apr 3, 2006	8.12	8.25	7.90	8.21
165	NASDAQ	ATRC	Fri, Mar 31, 2006	7.76	8.02	7.70	8.00
164	NASDAQ	ATRC	Thu, Mar 30, 2006	7.65	7.90	7.59	7.84
163	NASDAQ	ATRC	Wed, Mar 29, 2006	7.44	7.70	7.44	7.65
162	NASDAQ	ATRC	Tue, Mar 28, 2006	7.42	7.61	7.41	7.45
161	NASDAQ	ATRC	Mon, Mar 27, 2006	7.74	7.85	7.50	7.50
160	NASDAQ	ATRC	Fri, Mar 24, 2006	7.54	7.90	7.35	7.69
159	NASDAQ	ATRC	Thu, Mar 23, 2006	7.25	7.69	7.25	7.56
158	NASDAQ	ATRC	Wed, Mar 22, 2006	7.10	7.25	7.10	7.17
157	NASDAQ	ATRC	Tue, Mar 21, 2006	7.06	7.30	7.04	7.12
156	NASDAQ	ATRC	Mon, Mar 20, 2006	7.09	7.41	7.03	7.08
155	NASDAQ	ATRC	Fri, Mar 17, 2006	7.44	7.45	7.25	7.30
154	NASDAQ	ATRC	Thu, Mar 16, 2006	7.58	8.00	7.45	7.52
153	NASDAQ	ATRC	Wed, Mar 15, 2006	7.70	7.79	7.50	7.59
152	NASDAQ	ATRC	Tue, Mar 14, 2006	8.00	8.00	7.67	7.80
151	NASDAQ	ATRC	Mon, Mar 13, 2006	7.89	8.00	7.85	7.94
150	NASDAQ	ATRC	Fri, Mar 10, 2006	7.85	7.86	7.68	7.85
149	NASDAQ	ATRC	Thu, Mar 9, 2006	8.11	8.18	7.85	8.06
148	NASDAQ	ATRC	Wed, Mar 8, 2006	8.06	8.25	8.06	8.10
147	NASDAQ	ATRC	Tue, Mar 7, 2006	8.10	8.21	8.01	8.06
146	NASDAQ	ATRC	Mon, Mar 6, 2006	7.64	8.09	7.64	8.01
145	NASDAQ	ATRC	Fri, Mar 3, 2006	7.30	7.69	7.30	7.62
144	NASDAQ	ATRC	Thu, Mar 2, 2006	6.94	7.40	6.94	7.30
143	NASDAQ	ATRC	Wed, Mar 1, 2006	7.26	7.36	6.81	6.96
142	NASDAQ	ATRC	Tue, Feb 28, 2006	7.71	7.71	7.30	7.30
141	NASDAQ	ATRC	Mon, Feb 27, 2006	7.50	7.59	7.25	7.57
140	NASDAQ	ATRC	Fri, Feb 24, 2006	7.50	7.61	7.22	7.48
139	NASDAQ	ATRC	Thu, Feb 23, 2006	7.93	8.00	7.35	7.50
138	NASDAQ	ATRC	Wed, Feb 22, 2006	8.40	8.40	7.81	7.90
137	NASDAQ	ATRC	Tue, Feb 21, 2006	9.12	9.12	7.90	8.24
136	NASDAQ	ATRC	Fri, Feb 17, 2006	10.34	10.50	7.90	8.04
135	NASDAQ	ATRC	Thu, Feb 16, 2006	10.55	10.95	10.36	10.36
134	NASDAQ	ATRC	Wed, Feb 15, 2006	10.51	10.55	10.10	10.40
133	NASDAQ	ATRC	Tue, Feb 14, 2006	10.80	10.80	10.40	10.54
132	NASDAQ	ATRC	Mon, Feb 13, 2006	10.95	10.95	10.80	10.80
131	NASDAQ	ATRC	Fri, Feb 10, 2006	11.00	11.00	10.90	10.90
130	NASDAQ	ATRC	Thu, Feb 9, 2006	11.11	11.11	11.00	11.00
129	NASDAQ	ATRC	Wed, Feb 8, 2006	11.12	11.12	11.00	11.06
128	NASDAQ	ATRC	Tue, Feb 7, 2006	11.09	11.38	11.07	11.16
127	NASDAQ	ATRC	Mon, Feb 6, 2006	11.05	11.30	10.98	11.00
126	NASDAQ	ATRC	Fri, Feb 3, 2006	11.63	11.63	11.27	11.39
125	NASDAQ	ATRC	Thu, Feb 2, 2006	11.45	11.60	11.27	11.29
124	NASDAQ	ATRC	Wed, Feb 1, 2006	11.30	11.69	11.26	11.47
123	NASDAQ	ATRC	Tue, Jan 31, 2006	11.56	11.56	11.22	11.25
122	NASDAQ	ATRC	Mon, Jan 30, 2006	11.57	11.75	11.53	11.75
121	NASDAQ	ATRC	Fri, Jan 27, 2006	11.74	11.85	11.31	11.55
120	NASDAQ	ATRC	Thu, Jan 26, 2006	11.55	11.89	11.50	11.80
119	NASDAQ	ATRC	Wed, Jan 25, 2006	11.67	11.74	11.59	11.74
118	NASDAQ	ATRC	Tue, Jan 24, 2006	11.59	11.65	11.59	11.65
117	NASDAQ	ATRC	Mon, Jan 23, 2006	11.74	11.75	11.48	11.60
116	NASDAQ	ATRC	Fri, Jan 20, 2006	11.70	11.70	11.20	11.31
115	NASDAQ	ATRC	Thu, Jan 19, 2006	11.50	11.60	11.39	11.50
114	NASDAQ	ATRC	Wed, Jan 18, 2006	12.00	12.00	11.46	11.59
113	NASDAQ	ATRC	Tue, Jan 17, 2006	11.55	11.69	11.55	11.60
112	NASDAQ	ATRC	Fri, Jan 13, 2006	11.50	11.67	11.50	11.67
111	NASDAQ	ATRC	Thu, Jan 12, 2006	11.66	11.75	11.50	11.50
110	NASDAQ	ATRC	Wed, Jan 11, 2006	11.80	11.99	11.58	11.71
109	NASDAQ	ATRC	Tue, Jan 10, 2006	11.38	11.80	11.38	11.80
108	NASDAQ	ATRC	Mon, Jan 9, 2006	11.12	11.38	11.00	11.20
107	NASDAQ	ATRC	Fri, Jan 6, 2006	11.30	11.30	10.71	10.90
106	NASDAQ	ATRC	Thu, Jan 5, 2006	11.23	11.54	11.23	11.31
105	NASDAQ	ATRC	Wed, Jan 4, 2006	11.14	11.14	10.90	11.10
104	NASDAQ	ATRC	Tue, Jan 3, 2006	10.65	10.79	10.54	10.79
103	NASDAQ	ATRC	Fri, Dec 30, 2005	10.80	10.80	10.50	10.65
102	NASDAQ	ATRC	Thu, Dec 29, 2005	10.82	10.98	10.68	10.88
101	NASDAQ	ATRC	Wed, Dec 28, 2005	11.30	11.34	10.90	10.95
100	NASDAQ	ATRC	Tue, Dec 27, 2005	11.51	11.69	11.30	11.50
99	NASDAQ	ATRC	Fri, Dec 23, 2005	12.00	12.09	11.61	11.61
98	NASDAQ	ATRC	Thu, Dec 22, 2005	12.10	12.19	12.00	12.02
97	NASDAQ	ATRC	Wed, Dec 21, 2005	12.24	12.75	12.06	12.19
96	NASDAQ	ATRC	Tue, Dec 20, 2005	12.05	12.60	12.05	12.20
95	NASDAQ	ATRC	Mon, Dec 19, 2005	12.36	12.36	12.10	12.19
94	NASDAQ	ATRC	Fri, Dec 16, 2005	12.90	12.90	12.36	12.37
93	NASDAQ	ATRC	Thu, Dec 15, 2005	12.90	12.90	12.65	12.73
92	NASDAQ	ATRC	Wed, Dec 14, 2005	13.10	13.10	12.76	12.97
91	NASDAQ	ATRC	Tue, Dec 13, 2005	13.17	13.17	12.76	12.87
90	NASDAQ	ATRC	Mon, Dec 12, 2005	12.16	13.85	12.16	12.87
89	NASDAQ	ATRC	Fri, Dec 9, 2005	13.74	14.11	13.40	14.00
88	NASDAQ	ATRC	Thu, Dec 8, 2005	13.75	13.97	13.25	13.53
87	NASDAQ	ATRC	Wed, Dec 7, 2005	13.18	13.85	13.18	13.53
86	NASDAQ	ATRC	Tue, Dec 6, 2005	12.52	13.53	12.52	13.50
85	NASDAQ	ATRC	Mon, Dec 5, 2005	12.86	13.28	12.86	13.20
84	NASDAQ	ATRC	Fri, Dec 2, 2005	12.83	13.20	12.83	13.20
83	NASDAQ	ATRC	Thu, Dec 1, 2005	12.45	12.89	12.45	12.59
82	NASDAQ	ATRC	Wed, Nov 30, 2005	13.19	13.20	12.69	12.69
81	NASDAQ	ATRC	Tue, Nov 29, 2005	11.71	13.25	11.71	13.20
80	NASDAQ	ATRC	Mon, Nov 28, 2005	11.44	12.27	11.44	11.94
79	NASDAQ	ATRC	Fri, Nov 25, 2005	11.50	11.50	11.50	11.50
78	NASDAQ	ATRC	Wed, Nov 23, 2005	11.66	11.96	11.55	11.55
77	NASDAQ	ATRC	Tue, Nov 22, 2005	12.02	12.02	11.71	11.71
76	NASDAQ	ATRC	Mon, Nov 21, 2005	11.90	12.00	11.71	11.94
75	NASDAQ	ATRC	Fri, Nov 18, 2005	12.32	12.32	11.85	11.86
74	NASDAQ	ATRC	Thu, Nov 17, 2005	11.90	12.04	11.81	12.00
73	NASDAQ	ATRC	Wed, Nov 16, 2005	12.19	12.19	11.83	11.85
72	NASDAQ	ATRC	Tue, Nov 15, 2005	12.49	12.49	12.04	12.04
71	NASDAQ	ATRC	Mon, Nov 14, 2005	12.23	12.47	12.20	12.22
70	NASDAQ	ATRC	Fri, Nov 11, 2005	12.10	12.74	11.85	12.22
69	NASDAQ	ATRC	Thu, Nov 10, 2005	12.43	12.70	12.07	12.39
68	NASDAQ	ATRC	Wed, Nov 9, 2005	12.96	12.96	12.65	12.65
67	NASDAQ	ATRC	Tue, Nov 8, 2005	12.94	12.94	12.76	12.76
66	NASDAQ	ATRC	Mon, Nov 7, 2005	12.99	13.08	12.77	13.00
65	NASDAQ	ATRC	Fri, Nov 4, 2005	11.54	13.00	11.54	12.97
64	NASDAQ	ATRC	Thu, Nov 3, 2005	13.00	13.02	11.07	12.32
63	NASDAQ	ATRC	Wed, Nov 2, 2005	13.00	13.00	12.96	12.99
62	NASDAQ	ATRC	Tue, Nov 1, 2005	12.47	14.10	12.19	12.98
61	NASDAQ	ATRC	Mon, Oct 31, 2005	10.96	12.23	10.96	12.20
60	NASDAQ	ATRC	Fri, Oct 28, 2005	11.62	11.62	10.67	10.67
59	NASDAQ	ATRC	Thu, Oct 27, 2005	12.77	13.00	10.66	11.30
58	NASDAQ	ATRC	Wed, Oct 26, 2005	12.94	13.15	12.67	13.05
57	NASDAQ	ATRC	Tue, Oct 25, 2005	13.51	13.51	12.81	12.93
56	NASDAQ	ATRC	Mon, Oct 24, 2005	13.85	14.06	13.53	13.57
55	NASDAQ	ATRC	Fri, Oct 21, 2005	14.00	14.14	13.70	13.77
54	NASDAQ	ATRC	Thu, Oct 20, 2005	13.71	13.71	13.70	13.70
53	NASDAQ	ATRC	Wed, Oct 19, 2005	13.79	13.87	13.71	13.81
52	NASDAQ	ATRC	Tue, Oct 18, 2005	13.80	14.13	13.75	13.80
51	NASDAQ	ATRC	Mon, Oct 17, 2005	14.01	14.01	14.00	14.00
50	NASDAQ	ATRC	Fri, Oct 14, 2005	14.00	14.15	14.00	14.01
49	NASDAQ	ATRC	Thu, Oct 13, 2005	14.18	14.18	14.00	14.01
48	NASDAQ	ATRC	Wed, Oct 12, 2005	14.16	14.16	14.00	14.08
47	NASDAQ	ATRC	Tue, Oct 11, 2005	14.27	14.27	14.15	14.16
46	NASDAQ	ATRC	Mon, Oct 10, 2005	14.20	14.32	14.15	14.21
45	NASDAQ	ATRC	Fri, Oct 7, 2005	13.60	14.18	13.60	14.18
44	NASDAQ	ATRC	Thu, Oct 6, 2005	13.68	13.75	13.60	13.75
43	NASDAQ	ATRC	Wed, Oct 5, 2005	13.61	13.76	13.50	13.70
42	NASDAQ	ATRC	Tue, Oct 4, 2005	13.85	14.00	13.60	13.71
41	NASDAQ	ATRC	Mon, Oct 3, 2005	13.99	14.01	13.85	13.99
40	NASDAQ	ATRC	Fri, Sep 30, 2005	13.82	14.12	13.80	13.90
39	NASDAQ	ATRC	Thu, Sep 29, 2005	14.00	14.05	13.79	13.91
38	NASDAQ	ATRC	Wed, Sep 28, 2005	13.87	13.91	13.67	13.85
37	NASDAQ	ATRC	Tue, Sep 27, 2005	13.70	13.80	13.55	13.64
36	NASDAQ	ATRC	Mon, Sep 26, 2005	13.65	13.92	13.65	13.70
35	NASDAQ	ATRC	Fri, Sep 23, 2005	13.86	13.89	13.67	13.70
34	NASDAQ	ATRC	Thu, Sep 22, 2005	13.69	13.98	13.55	13.68
33	NASDAQ	ATRC	Wed, Sep 21, 2005	13.76	14.01	13.60	13.84
32	NASDAQ	ATRC	Tue, Sep 20, 2005	13.75	14.15	13.75	13.90
31	NASDAQ	ATRC	Mon, Sep 19, 2005	13.96	14.10	13.87	13.92
30	NASDAQ	ATRC	Fri, Sep 16, 2005	15.18	15.18	13.85	13.99
29	NASDAQ	ATRC	Thu, Sep 15, 2005	13.75	13.89	13.25	13.83
28	NASDAQ	ATRC	Wed, Sep 14, 2005	13.89	14.00	13.50	13.95
27	NASDAQ	ATRC	Tue, Sep 13, 2005	13.35	14.12	13.35	13.89
26	NASDAQ	ATRC	Mon, Sep 12, 2005	13.10	13.66	13.00	13.55
25	NASDAQ	ATRC	Fri, Sep 9, 2005	12.75	13.20	12.75	13.10
24	NASDAQ	ATRC	Thu, Sep 8, 2005	12.62	13.00	12.62	12.75
23	NASDAQ	ATRC	Wed, Sep 7, 2005	12.78	13.14	12.50	12.89
22	NASDAQ	ATRC	Tue, Sep 6, 2005	13.12	13.25	12.53	12.70
21	NASDAQ	ATRC	Fri, Sep 2, 2005	13.51	13.76	13.26	13.26
20	NASDAQ	ATRC	Thu, Sep 1, 2005	13.40	13.89	13.40	13.74
19	NASDAQ	ATRC	Wed, Aug 31, 2005	13.65	13.72	13.55	13.60
18	NASDAQ	ATRC	Tue, Aug 30, 2005	13.50	13.62	13.27	13.60
17	NASDAQ	ATRC	Mon, Aug 29, 2005	13.75	13.75	13.40	13.60
16	NASDAQ	ATRC	Fri, Aug 26, 2005	13.20	13.83	13.12	13.65
15	NASDAQ	ATRC	Thu, Aug 25, 2005	13.87	14.00	13.78	14.00
14	NASDAQ	ATRC	Wed, Aug 24, 2005	14.00	14.05	13.88	14.00
13	NASDAQ	ATRC	Tue, Aug 23, 2005	14.40	14.40	14.00	14.03
12	NASDAQ	ATRC	Mon, Aug 22, 2005	14.12	14.60	14.12	14.30
11	NASDAQ	ATRC	Fri, Aug 19, 2005	14.10	14.25	14.07	14.13
10	NASDAQ	ATRC	Thu, Aug 18, 2005	14.00	14.25	14.00	14.12
9	NASDAQ	ATRC	Wed, Aug 17, 2005	14.00	14.16	14.00	14.00
8	NASDAQ	ATRC	Tue, Aug 16, 2005	13.76	14.16	13.75	14.00
7	NASDAQ	ATRC	Mon, Aug 15, 2005	14.03	14.36	14.00	14.09
6	NASDAQ	ATRC	Fri, Aug 12, 2005	14.80	14.80	14.00	14.07
5	NASDAQ	ATRC	Thu, Aug 11, 2005	14.98	14.98	14.34	14.95
4	NASDAQ	ATRC	Wed, Aug 10, 2005	15.02	15.12	14.25	14.50
3	NASDAQ	ATRC	Tue, Aug 9, 2005	14.00	15.00	14.00	14.70
2	NASDAQ	ATRC	Mon, Aug 8, 2005	14.30	15.05	14.00	14.20
1	NASDAQ	ATRC	Fri, Aug 5, 2005	12.10	15.45	12.03	14.08
#	Exchange	Symbol	Date	Open	High	Low	Close

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