Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Net revenues:
Products	$ 43,280	$ 13,079
Service	8,296	11,473
Total net revenues	51,576	24,552
Costs of net revenues:
Cost of products	21,639	7,960
Cost of service	5,114	5,448
Amortization of intangible assets	674	658
Total costs of net revenues	27,427	14,066
Gross profit	24,149	10,486
Operating expenses:
Research and development	8,314	7,447
Selling	7,373	6,932
General and administrative	6,338	5,512
Amortization of intangible assets	108	198
Total operating expenses	22,133	20,089
Income (loss) from operations	2,016	(9,603)
Other income (expense)
Interest income	14	25
Interest expense	(100)	(226)
Other expense, net	252	40
Total other income (expense), net	166	(161)
Income (loss) before income taxes	2,182	(9,764)
Provision for (benefit from) income taxes	587	(4,182)
Net income (loss)	$ 1,595	$ (5,582)
Net income (loss) per share:
Basic (dollars per share)	$ 0.07	$ (0.24)
Diluted (dollars per share)	$ 0.07	$ (0.24)
Weighted shares used in per share calculation:
Basic (shares)	23,711	23,341
Diluted (shares)	24,159	23,341