Condensed Consolidated Statements of Comprehensive Income (Unaudited) (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
Net revenues:
Products	$ 41,556	$ 54,227	$ 89,414	$ 108,210
Service	11,625	10,145	19,259	18,305
Total net revenues	53,181	64,372	108,673	126,515
Costs of net revenues:
Cost of products	22,627	23,334	47,446	45,981
Cost of service	5,158	4,934	10,128	9,275
Amortization of intangible assets	637	232	1,274	464
Total costs of net revenues	28,422	28,500	58,848	55,720
Gross profit	24,759	35,872	49,825	70,795
Operating expenses:
Research and development	7,644	5,779	15,120	11,267
Selling	7,041	6,997	14,252	13,696
General and administrative	5,583	5,442	11,664	10,941
Amortization of intangible assets	195	169	387	343
Total operating expenses	20,463	18,387	41,423	36,247
Income from operations	4,296	17,485	8,402	34,548
Other income (expense)
Interest income	33	65	85	105
Interest expense	(264)	(341)	(533)	(678)
Other, net	(49)	(470)	(224)	(983)
Total other expense, net	(280)	(746)	(672)	(1,556)
Income before income taxes	4,016	16,739	7,730	32,992
Provision (benefit from) for income taxes	(490)	5,652	1,521	11,395
Net income	4,506	11,087	6,209	21,597
Other Comprehensive Income:
Unrealized gains (losses)	(4)		(4)
Foreign currency translation gain	(1,164)	1,039	(918)	1,373
Comprehensive Income	$ 3,338	$ 12,126	$ 5,287	$ 22,970
Net income per share:
Basic	$ 0.19	$ 0.49	$ 0.27	$ 0.95
Diluted	$ 0.19	$ 0.47	$ 0.26	$ 0.92
Shares used in per share calculation:
Basic	23,395	22,709	23,372	22,637
Diluted	23,877	23,442	23,924	23,422