Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue:
Product	$ 22,326	$ 32,286
Research services	676	535
Total revenue	23,002	32,821
Cost of revenue:
Product	20,470	25,992
Research services	311	302
Gross profit	2,221	6,527
Operating expenses:
Research and development	1,576	1,310
Sales and marketing	3,110	3,062
General and administrative	6,587	3,913
Total operating expenses	11,273	8,285
Loss from operations	(9,052)	(1,758)
Interest expense, net	(26)	(39)
Total interest expense, net	(26)	(39)
Net loss	$ (9,078)	$ (1,797)
Net loss per share:
Basic and diluted	$ (0.39)	$ (0.08)
Weighted-average common shares outstanding:
Basic and diluted	23,257,541	23,063,471