Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues	$ 28,773	$ 55,397	$ 101,476	$ 171,831
Cost of Goods Sold, Product	20,361	33,997	60,450	107,937
Revenue, Product	20,641	46,175	75,680	145,122
Revenue, Service	8,132	9,222	25,796	26,709
Cost of sales:
Cost of Goods Sold, Service	5,291	5,228	15,821	15,639
Amortization of purchased technology	1,926	1,926	5,780	5,780
Total cost of sales	27,578	41,151	82,051	129,356
Gross margin	1,195	14,246	19,425	42,475
Research and development	5,639	6,093	18,113	18,044
Selling, general and administrative	7,849	8,321	25,445	24,514
Intangible asset amortization	289	1,260	2,809	3,780
Restructuring and acquisition-related charges, net	1,344	655	2,814	1,602
Income (loss) from operations	(13,926)	(2,083)	(29,756)	(5,465)
Interest expense	(431)	(116)	(927)	(392)
Other income (expense), net	(116)	255	(543)	1,463
Income (loss) before income tax expense (benefit)	(14,473)	(1,944)	(31,226)	(4,394)
Income tax expense (benefit)	938	694	1,747	1,800
Net income (loss)	$ (15,411)	$ (2,638)	$ (32,973)	$ (6,194)
Net income (loss) per share:
Basic (in dollars per share)	$ (0.39)	$ (0.07)	$ (0.85)	$ (0.17)
Diluted (in dollars per share)	$ (0.39)	$ (0.07)	$ (0.85)	$ (0.17)
Weighted average shares outstanding:
Basic (in shares)	39,087	38,056	38,922	37,402
Diluted (in shares)	39,087	38,056	38,922	37,402