Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue	$ 5,525	$ 3,076	$ 9,224	$ 6,117
Cost of revenue	2,711	1,837	5,063	3,456
Gross profit	2,814	1,239	4,161	2,661
Operating expenses:
Research and development	3,672	3,440	7,428	5,828
Selling, general and administrative	9,437	6,862	18,368	12,312
Total operating expenses	13,109	10,302	25,796	18,140
Loss from operations	(10,295)	(9,063)	(21,635)	(15,479)
Interest expense, net	(1,063)	(1,345)	(2,133)	(1,608)
Other expense, net		(17)	(10)	(33)
Net loss from consolidated companies	(11,358)	(10,425)	(23,778)	(17,120)
Loss from minority interest in limited liability company	(158)		(407)
Comprehensive and net loss	$ (11,516)	$ (10,425)	$ (24,185)	$ (17,120)
Net loss per share:
Basic and diluted (in dollars per share)	$ (0.37)	$ (0.54)	$ (0.85)	$ (1.10)
Weighted average shares used in computing net loss per common share:
Basic and diluted (in shares)	31,305,386	19,373,322	28,591,134	15,539,840