Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues	$ 26,190	$ 37,610
Cost of Goods Sold, Product	12,308	22,175
Revenue, Product	17,642	28,699
Revenue, Service	8,548	8,911
Cost of sales:
Cost of Goods Sold, Service	4,987	5,286
Amortization of purchased technology	1,927	1,927
Total cost of sales	19,222	29,388
Gross margin	6,968	8,222
Research and development	3,686	6,480
Selling, general and administrative	7,334	9,382
Intangible asset amortization	198	1,260
Restructuring and acquisition-related charges, net	1,571	235
Income (loss) from operations	(5,821)	(9,135)
Change in fair value of Warrant liability	1,852	0
Interest expense	(1,430)	(272)
Other income (expense), net	(181)	(297)
Income (loss) before income tax expense (benefit)	(5,580)	(9,704)
Income tax expense (benefit)	865	304
Net income (loss)	$ (6,445)	$ (10,008)
Net income (loss) per share:
Basic (in dollars per share)	$ (0.16)	$ (0.26)
Diluted (in dollars per share)	$ (0.16)	$ (0.26)
Weighted average shares outstanding:
Basic (in shares)	39,355	38,715
Diluted (in shares)	39,355	38,715