Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Revenue	$ 87,154	$ 70,889	$ 243,006	$ 213,381
Costs and expenses:
Cost of products sold	40,778	32,341	113,365	98,297
Research and development	20,254	20,446	58,635	58,955
Selling, general and administrative	16,385	17,720	49,955	55,048
Acquisition related charges, including amortization of intangible assets	737	729	2,223	3,418
Restructuring charges	85	0	257	643
Costs and expenses	78,239	71,236	224,435	216,361
Income (loss) from operations	8,915	(347)	18,571	(2,980)
Other income, net	346	88	240	846
Income (loss) before income taxes	9,261	(259)	18,811	(2,134)
Provision for income taxes	417	1,916	3,037	20,297
Net Income (loss)	8,844	(2,175)	15,774	(22,431)
Net Income (loss) per share:
Basic (in dollars per share)	$ 0.08	$ (0.02)	$ 0.14	$ (0.19)
Diluted (in dollars per share)	$ 0.08	$ (0.02)	$ 0.13	$ (0.19)
Shares used in per share calculations:
Basic (in shares)	116,055	116,785	115,730	117,612
Diluted (in shares)	117,349	116,785	117,093	117,612
Comprehensive Income (loss):
Net Income (loss)	8,844	(2,175)	15,774	(22,431)
Other comprehensive income:
Unrealized gain (loss) related to marketable securities, net	221	39	(11)	17
Less: reclassification adjustment for losses (gains) included in other income, net	1	0	303	(78)
Translation adjustment	225	(15)	(205)	244
Comprehensive Income (loss)	$ 9,291	$ (2,151)	$ 15,861	$ (22,248)