Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements of Operations
Net sales	$ 184,947	$ 138,336	$ 42,748
Cost of sales	128,699	98,952	46,960
Gross profit (loss)	56,248	39,384	(4,212)
Operating expenses:
Research, development and engineering	26,189	27,791	25,340
Selling, general and administrative	44,720	44,902	44,863
Restructuring charges	1,889	(114)	2,596
Total operating expenses	72,798	72,579	72,799
Loss from operations	(16,550)	(33,195)	(77,011)
Interest income (expense), net	107	5	532
Other income (expense), net	163	108	1,371
Loss before income taxes	(16,280)	(33,082)	(75,108)
Provision for (benefit from) income taxes	1,670	321	(8,066)
Net loss	$ (17,950)	$ (33,403)	$ (67,042)
Net loss per share:
Basic and diluted	$ (0.32)	$ (0.67)	$ (1.35)
Shares used in computing net loss per share:
Basic and diluted	55,299	50,073	49,832