Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Revenue	$ 70,792	$ 83,861	$ 142,492	$ 166,476
Costs and expenses:
Cost of products sold	33,741	33,190	65,956	66,196
Research and development	19,363	18,631	38,509	38,771
Selling, general and administrative	19,405	17,738	37,328	34,908
Acquisition related charges	982	0	2,689	0
Restructuring charges	87	1,387	643	3,222
Costs and expenses	73,578	70,946	145,125	143,097
(Loss) income from operations	(2,786)	12,915	(2,633)	23,379
Other income, net	694	268	758	931
(Loss) income before income taxes	(2,092)	13,183	(1,875)	24,310
Provision for income taxes	10,450	152	18,381	360
Net (loss) income	(12,542)	13,031	(20,256)	23,950
Net (loss) income per share:
Basic	$ (0.11)	$ 0.11	$ (0.17)	$ 0.20
Diluted	$ (0.11)	$ 0.11	$ (0.17)	$ 0.20
Shares used in per share calculations:
Basic	117,874	118,047	118,024	118,021
Diluted	117,874	121,468	118,024	121,695
Comprehensive (loss) income
Net (loss) income	(12,542)	13,031	(20,256)	23,950
Other comprehensive income:
Unrealized gain (loss) related to marketable securities, net	43	(16)	(22)	(7)
Reclassification adjustment for gains on the sale of marketable securities included in net income	(78)	0	(78)	(133)
Translation adjustment	104	(130)	259	(55)
Comprehensive (loss) income	$ (12,473)	$ 12,885	$ (20,097)	$ 23,755