Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Net revenues:
Products	$ 13,079	$ 47,858
Service	11,473	7,634
Total net revenues	24,552	55,492
Costs of net revenues:
Cost of products	7,960	24,819
Cost of service	5,448	4,970
Amortization of intangible assets	658	637
Total costs of net revenues	14,066	30,426
Gross profit	10,486	25,066
Operating expenses:
Research and development	7,447	7,476
Selling	6,932	7,211
General and administrative	5,512	6,081
Amortization of intangible assets	198	192
Total operating expenses	20,089	20,960
Income (loss) from operations	(9,603)	4,106
Other income (expense)
Interest income	25	52
Interest expense	(226)	(269)
Other, net	40	(175)
Total other expense, net	(161)	(392)
Income (loss) before income taxes	(9,764)	3,714
Provision for (benefit from) income taxes	(4,182)	2,011
Net income (loss)	$ (5,582)	$ 1,703
Net income (loss) per share:
Basic	$ (0.24)	$ 0.07
Diluted	$ (0.24)	$ 0.07
Shares used in per share calculation:
Basic	23,341	23,349
Diluted	23,341	23,981