Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue:
Product			$ 5,240	$ 99
Service	$ 299	$ 182	515	363
Total revenue	299	182	5,755	462
Cost of revenue:
Product	139	391	6,066	545
Service	724	442	1,325	1,065
Total cost of revenue	863	833	7,391	1,610
Gross margin	(564)	(651)	(1,636)	(1,148)
Operating expenses:
Research and development	2,964	2,258	6,363	4,506
Selling and marketing	1,402	1,227	2,681	2,191
General and administrative	5,788	7,174	12,108	11,497
Total operating expenses	10,154	10,659	21,152	18,194
Loss from operations	(10,718)	(11,310)	(22,788)	(19,342)
Interest income			1	1
Interest expense	(1,377)	(839)	(2,459)	(1,323)
Other income (expense), net	(20)	(25)	(237)	35
Loss before provision for income taxes	(12,115)	(12,174)	(25,483)	(20,629)
Provision for income taxes	0	0	0	0
Net loss attributable to common stockholders	$ (12,115)	$ (12,174)	$ (25,483)	$ (20,629)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.32)	$ (13.24)	$ (0.67)	$ (22.52)
Weighted-average common shares used to compute net loss per share attributable to common stockholders, basic and diluted	38,234,703	919,776	38,223,071	915,870