Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue:
Product		$ 5,020	$ 5,240	$ 5,119
Service	$ 298	56	813	419
Distribution rights	59		59
Grant		240		240
Total revenue	357	5,316	6,112	5,778
Cost of revenue:
Product	803	5,766	6,869	6,311
Service	380	325	1,705	1,390
Total cost of revenue	1,183	6,091	8,574	7,701
Gross margin	(826)	(775)	(2,462)	(1,923)
Operating expenses:
Research and development	2,654	2,902	9,017	7,408
Selling and marketing	1,570	1,124	4,251	3,315
General and administrative	5,829	4,282	17,937	15,779
Total operating expenses	10,053	8,308	31,205	26,502
Loss from operations	(10,879)	(9,083)	(33,667)	(28,425)
Interest income	1		2	1
Interest expense	(1,707)	(1,053)	(4,166)	(2,376)
Other income (expense), net	(1,561)	(124)	(1,798)	(89)
Loss before provision for income taxes	(14,146)	(10,260)	(39,629)	(30,889)
Provision for income taxes	0	0	0	0
Net loss	$ (14,146)	$ (10,260)	$ (39,629)	$ (30,889)
Net loss per share, basic and diluted	$ (0.35)	$ (0.35)	$ (1.02)	$ (2.96)
Weighted-average common shares used to compute net loss per share attributable to common stockholders, basic and diluted	40,156,851	29,157,069	38,915,156	10,433,051