Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Net sales	$ 20,398	$ 44,945	$ 105,786	$ 143,253
Cost of sales	12,664	29,429	67,863	100,872
Gross profit	7,734	15,516	37,923	42,381
Operating expenses:
Research, development and engineering	5,217	6,733	17,638	19,893
Selling, general and administrative	8,205	11,227	28,777	34,119
Restructuring charges	453	181	2,004	103
Total operating expenses	13,875	18,141	48,419	54,115
Loss from operations	(6,141)	(2,625)	(10,496)	(11,734)
Interest income (expense), net	36	24	106	61
Other income (expense), net	(45)	548	60	(1,927)
Loss before income taxes	(6,150)	(2,053)	(10,330)	(13,600)
Provision for (benefit from) income taxes	(116)	236	169	176
Net loss	$ (6,034)	$ (2,289)	$ (10,499)	$ (13,776)
Net loss per share:
Basic and diluted (in usd per share)	$ (0.10)	$ (0.04)	$ (0.18)	$ (0.25)
Shares used in computing net loss per share:
Basic and Diluted (in shares)	58,586	58,224	58,504	54,324