Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue:
Product	$ 25,379	$ 0
Service	692	1,108
Distribution rights	119	119
Total revenue	26,190	1,227
Cost of revenue:
Product	19,711	266
Service	909	776
Total cost of revenue	20,620	1,042
Gross margin	5,570	185
Operating expenses:
Research and development	3,770	2,914
Selling and marketing	3,246	1,072
General and administrative	9,846	7,151
Total operating expenses	16,862	11,137
Loss from operations	(11,292)	(10,952)
Interest income	2	1
Interest expense	(1,866)	(1,737)
Other income (expense), net	8,342	(15,273)
Loss before provision for income taxes	(4,814)	(27,961)
Provision for income taxes	0	0
Net loss and comprehensive loss	(4,814)	(27,961)
Amortization of beneficial conversion feature related to Series A convertible preferred stock	(2,728)	0
Net loss attributable to common stockholders, basic and diluted	$ (7,542)	$ (27,961)
Net loss per share, basic and diluted	$ (0.11)	$ (0.54)
Weighted-average common shares used to compute net loss per share attributable to common stockholders, basic and diluted	68,943,918	51,821,422