Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues	$ 49,964	$ 65,438	$ 93,763	$ 133,616
Cost of sales:
Cost of sales	35,902	43,756	66,499	90,062
Amortization of purchased technology	2,055	2,218	4,109	4,435
Total cost of sales	37,957	45,974	70,608	94,497
Gross margin	12,007	19,464	23,155	39,119
Research and development	8,408	12,020	16,827	23,555
Selling, general and administrative	8,953	9,527	18,549	20,623
Intangible asset amortization	1,260	1,304	2,557	2,608
Restructuring and acquisition-related charges, net	815	(114)	2,115	1,156
Income (loss) from operations	(7,429)	(3,273)	(16,893)	(8,823)
Interest expense	(345)	(281)	(632)	(613)
Other income (expense), net	157	226	336	373
Income (loss) before income tax expense (benefit)	(7,617)	(3,328)	(17,189)	(9,063)
Income tax expense (benefit)	594	784	1,456	1,606
Net income (loss)	$ (8,211)	$ (4,112)	$ (18,645)	$ (10,669)
Net income (loss) per share:
Basic (in dollars per share)	$ (0.23)	$ (0.14)	$ (0.57)	$ (0.37)
Diluted (in dollars per share)	$ (0.23)	$ (0.14)	$ (0.57)	$ (0.37)
Weighted average shares outstanding:
Basic (in shares)	36,096	28,669	32,980	28,570
Diluted (in shares)	36,096	28,669	32,980	28,570