Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue:
Total revenue	$ 15,525	$ 14,250
Cost of revenue:
Total cost of revenue	15,203	16,357
Gross profit (loss)	322	(2,107)
Operating expenses:
Research and development	6,510	6,337
Selling and marketing	2,848	5,823
General and administrative	15,639	15,788
Total operating expenses	24,997	27,948
Loss from operations	(24,675)	(30,055)
Interest income	2	695
Interest expense	(1,058)	(1,038)
Other (expense) income, net	(1,012)	2,866
Loss before provision for income taxes	(26,743)	(27,532)
Provision for income taxes	0	0
Net loss and comprehensive loss	$ (26,743)	$ (27,532)
Net loss per share, basic and diluted	$ (0.17)	$ (0.19)
Weighted-average common shares used to compute net loss per share attributable to common stockholders, basic and diluted	160,138,327	147,457,116
Product
Revenue:
Total revenue	$ 11,379	$ 11,470
Cost of revenue:
Total cost of revenue	10,685	13,129
Service
Revenue:
Total revenue	4,027	2,661
Cost of revenue:
Total cost of revenue	4,518	3,228
Distribution Rights
Revenue:
Total revenue	$ 119	$ 119