Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue:
Total revenue	$ 14,250	$ 20,284
Cost of revenue:
Total cost of revenue	16,357	25,648
Gross margin	(2,107)	(5,364)
Operating expenses:
Research and development	6,337	5,031
Selling and marketing	5,823	4,885
General and administrative	15,788	15,109
Total operating expenses	27,948	25,025
Loss from operations	(30,055)	(30,389)
Interest income	695	220
Interest expense	(1,038)	(759)
Other income (expense), net	2,866	(2,433)
Loss before provision for income taxes	(27,532)	(33,361)
Provision for income taxes	0	0
Net loss and comprehensive loss	$ (27,532)	$ (33,361)
Net loss per share, basic and diluted	$ (0.19)	$ (0.34)
Weighted-average common shares used to compute net loss per share attributable to common stockholders, basic and diluted	147,457,116	96,741,309
Product
Revenue:
Total revenue	$ 11,470	$ 18,874
Cost of revenue:
Total cost of revenue	13,129	22,033
Service
Revenue:
Total revenue	2,661	1,291
Cost of revenue:
Total cost of revenue	3,228	3,615
Distribution Rights
Revenue:
Total revenue	$ 119	$ 119