Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue
Product	$ 278,875	$ 179,246	$ 169,587
Services	22,620	23,805	26,045
Total revenue	301,495	203,051	195,632
Cost of revenue
Product	181,060	113,285	106,678
Services	18,729	19,602	21,019
Total cost of revenue	199,789	132,887	127,697
Gross profit	101,706	70,164	67,935
Operating expenses
Research and development	32,586	33,533	34,756
Sales and marketing	23,325	20,713	21,159
General and administrative	25,059	23,958	25,471
Gain on sale of dry strip assets and intellectual property			(1,167)
Restructuring charges	18	2,621	2,334
Total operating expenses	80,988	80,825	82,553
Income (loss) from operations	20,718	(10,661)	(14,618)
Other (expense) income
Interest income	64	32	44
Interest expense	(4,976)	(1,069)	(457)
Other, net	(601)	1,531	(1,073)
Total other (expense) income	(5,513)	494	(1,486)
Income (loss) before income taxes	15,205	(10,167)	(16,104)
Income tax provision	527	1,099	1,040
Net income (loss)	$ 14,678	$ (11,266)	$ (17,144)
Net income (loss) per share
Basic (in dollars per share)	$ 0.13	$ (0.10)	$ (0.16)
Diluted (in dollars per share)	$ 0.12	$ (0.10)	$ (0.16)
Shares used in computing net income (loss) per share
Basic weighted average common shares	114,378	111,450	108,869
Diluted weighted average common shares	120,916	111,450	108,869