Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues	$ 44,780	$ 50,805	$ 140,516	$ 144,568
Cost of sales:
Cost of sales	29,812	34,052	96,347	100,551
Amortization of purchased technology	1,961	2,056	5,935	6,165
Total cost of sales	31,773	36,108	102,282	106,716
Gross margin	13,007	14,697	38,234	37,852
Research and development	6,054	7,657	19,618	24,484
Selling, general and administrative	7,561	8,554	22,536	27,103
Intangible asset amortization	1,260	1,260	3,780	3,817
Restructuring and acquisition-related charges, net	148	1,329	4,842	3,444
Income (loss) from operations	(2,016)	(4,103)	(12,542)	(20,996)
Interest expense	(97)	(317)	(417)	(949)
Other income (expense), net	568	463	1,126	799
Income (loss) before income tax expense (benefit)	(1,545)	(3,957)	(11,833)	(21,146)
Income tax expense (benefit)	521	512	1,405	1,968
Net income (loss)	$ (2,066)	$ (4,469)	$ (13,238)	$ (23,114)
Net income (loss) per share:
Basic (in dollars per share)	$ (0.06)	$ (0.12)	$ (0.36)	$ (0.68)
Diluted (in dollars per share)	$ (0.06)	$ (0.12)	$ (0.36)	$ (0.68)
Weighted average shares outstanding:
Basic (in shares)	36,830	36,332	36,740	34,097
Diluted (in shares)	36,830	36,332	36,740	34,097