Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues	$ 61,288	$ 47,049	$ 116,434	$ 95,736
Cost of sales:
Cost of sales	43,916	32,468	84,351	66,535
Amortization of purchased technology	1,927	1,980	3,854	3,974
Total cost of sales	45,843	34,448	88,205	70,509
Gross margin	15,445	12,601	28,229	25,227
Research and development	6,298	6,840	11,951	13,564
Selling, general and administrative	8,554	7,475	16,193	14,975
Intangible asset amortization	1,260	1,260	2,520	2,520
Restructuring and acquisition-related charges, net	265	559	947	4,694
Income (loss) from operations	(932)	(3,533)	(3,382)	(10,526)
Interest expense	(159)	(103)	(276)	(320)
Other income (expense), net	1,069	161	1,208	558
Income (loss) before income tax expense (benefit)	(22)	(3,475)	(2,450)	(10,288)
Income tax expense (benefit)	569	644	1,106	884
Net income (loss)	$ (591)	$ (4,119)	$ (3,556)	$ (11,172)
Net income (loss) per share:
Basic (in dollars per share)	$ (0.02)	$ (0.11)	$ (0.10)	$ (0.30)
Diluted (in dollars per share)	$ (0.02)	$ (0.11)	$ (0.10)	$ (0.30)
Weighted average shares outstanding:
Basic (in shares)	37,143	36,741	37,075	36,695
Diluted (in shares)	37,143	36,741	37,075	36,695