Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Revenue	$ 70,889	$ 81,720	$ 213,381	$ 248,196
Costs and expenses:
Cost of products sold	32,341	33,866	98,297	100,062
Research and development	20,446	16,999	58,955	55,770
Selling, general and administrative	17,720	16,809	55,048	51,717
Acquisition related charges	729	0	3,418	0
Restructuring charges	0	1,760	643	4,982
Costs and expenses	71,236	69,434	216,361	212,531
(Loss) income from operations	(347)	12,286	(2,980)	35,665
Other income, net	88	248	846	1,179
(Loss) income before income taxes	(259)	12,534	(2,134)	36,844
Provision (benefit) for income taxes	1,916	(803)	20,297	(443)
Net (loss) income	(2,175)	13,337	(22,431)	37,287
Net (loss) income per share:
Basic	$ (0.02)	$ 0.11	$ (0.19)	$ 0.32
Diluted	$ (0.02)	$ 0.11	$ (0.19)	$ 0.31
Shares used in per share calculations:
Basic	116,785	117,926	117,612	117,990
Diluted	116,785	120,627	117,612	121,343
Comprehensive (loss) income
Net (loss) income	(2,175)	13,337	(22,431)	37,287
Other comprehensive income:
Unrealized gain (loss) related to marketable securities, net	39	(1)	17	(8)
Reclassification adjustment for gains on the sale of marketable securities included in net income	0	0	(78)	(133)
Translation adjustment	(15)	(6)	244	(61)
Comprehensive (loss) income	$ (2,151)	$ 13,330	$ (22,248)	$ 37,085