Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Revenue	$ 71,158	$ 71,700
Costs and expenses:
Cost of products sold	33,003	32,215
Research and development	18,114	19,146
Selling, general and administrative	16,498	17,923
Acquisition related charges, including amortization of intangible assets	749	1,707
Restructuring charges	153	556
Costs and expenses	68,517	71,547
Income from operations	2,641	153
Other (expense) income, net	(52)	64
Income before income taxes	2,589	217
Provision for income taxes	699	7,931
Net Income (loss)	1,890	(7,714)
Net Income (loss) per share:
Basic (in dollars per share)	$ 0.02	$ (0.07)
Diluted (in dollars per share)	$ 0.02	$ (0.07)
Shares used in per share calculations:
Basic (in shares)	115,391	118,174
Diluted (in shares)	116,714	118,174
Comprehensive Income (loss)
Net Income (loss)	1,890	(7,714)
Other comprehensive income:
Unrealized (loss) gain related to marketable securities, net	(148)	(74)
Less: reclassification adjustment for losses included in net income (loss)	73	9
Translation adjustment	(165)	155
Comprehensive Income (loss)	$ 1,650	$ (7,624)