Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues	$ 27,023	$ 28,773	$ 77,626	$ 101,476
Cost of Goods Sold, Product	9,743	20,361	30,457	60,450
Revenue, Product	17,907	20,641	50,775	75,680
Revenue, Service	9,116	8,132	26,851	25,796
Cost of sales:
Cost of Goods Sold, Service	5,314	5,291	15,229	15,821
Amortization of purchased technology	226	1,926	4,080	5,780
Total cost of sales	15,283	27,578	49,766	82,051
Gross margin	11,740	1,195	27,860	19,425
Research and development	3,467	5,639	10,388	18,113
Selling, general and administrative	6,758	7,849	20,546	25,445
Intangible asset amortization	197	289	593	2,809
Restructuring and acquisition-related charges, net	1,130	1,344	3,990	2,814
Income (loss) from operations	188	(13,926)	(7,657)	(29,756)
Change in fair value of Warrant liability	(599)	0	(1,102)	0
Interest expense	(1,411)	(431)	(4,206)	(927)
Other income (expense), net	1,447	(116)	2,700	(543)
Income (loss) before income tax expense (benefit)	(375)	(14,473)	(10,265)	(31,226)
Income tax expense (benefit)	1,498	938	2,687	1,747
Net income (loss)	$ (1,873)	$ (15,411)	$ (12,952)	$ (32,973)
Net income (loss) per share:
Basic (in dollars per share)	$ (0.05)	$ (0.39)	$ (0.33)	$ (0.85)
Diluted (in dollars per share)	$ (0.05)	$ (0.39)	$ (0.33)	$ (0.85)
Weighted average shares outstanding:
Basic (in shares)	39,616	39,087	39,496	38,922
Diluted (in shares)	39,616	39,087	39,496	38,922