Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011	Jul. 03, 2010
Revenue	$ 83,861	$ 77,119	$ 166,476	$ 147,551
Costs and expenses:
Cost of products sold	33,190	29,889	66,196	59,153
Research and development	18,631	15,158	38,771	29,840
Selling, general and administrative	17,738	16,385	34,908	31,803
Restructuring charges	1,387	(120)	3,222	(38)
Costs and Expenses	70,946	61,312	143,097	120,758
Income from operations	12,915	15,807	23,379	26,793
Other income, net	268	945	931	1,247
Income before provision for income taxes	13,183	16,752	24,310	28,040
Provision for income taxes	152	16	360	215
Net income	$ 13,031	$ 16,736	$ 23,950	$ 27,825
Net income per share:
Basic	$ 0.11	$ 0.14	$ 0.20	$ 0.24
Diluted	$ 0.11	$ 0.14	$ 0.20	$ 0.23
Shares used in per share calculations:
Basic	118,047	116,101	118,021	115,873
Diluted	121,468	120,270	121,695	118,727