Condensed Consolidated Statements of Operations and Comprehensive Loss (Statement) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Total revenue	$ 19,177	$ 10,086	$ 49,732	$ 38,560
Total cost of revenue	17,283	11,150	49,188	42,773
Gross profit (loss)	1,894	(1,064)	544	(4,213)
Operating expenses:
Research and development	8,370	5,245	22,783	17,793
Selling and marketing	4,296	2,669	10,196	11,585
General and administrative	12,519	16,031	42,016	47,046
Total operating expenses	25,185	23,945	74,995	76,424
Loss from operations	(23,291)	(25,009)	(74,451)	(80,637)
Interest income	4	5	9	787
Interest expense	(1,061)	(1,074)	(3,179)	(3,183)
Other (expense) income, net	(913)	(2,047)	(5,359)	1,224
Loss before provision for income taxes	(25,261)	(28,125)	(82,980)	(81,809)
Provision for income taxes	0	0	0	0
Net loss and comprehensive loss	$ (25,261)	$ (28,125)	$ (82,980)	$ (81,809)
Net loss per share, basic (in USD per share)	$ (0.15)	$ (0.19)	$ (0.51)	$ (0.55)
Net loss per share, diluted (in USD per share)	$ (0.15)	$ (0.19)	$ (0.51)	$ (0.55)
Weighted-average common shares used to compute net loss per share attributable to common stockholders, basic (in shares)	164,244,972	148,042,972	162,278,489	147,683,344
Weighted-average common shares used to compute net loss per share attributable to common stockholders, diluted (in shares)	164,244,972	148,042,972	162,278,489	147,683,344
Product
Total revenue	$ 14,126	$ 6,210	$ 36,422	$ 28,295
Total cost of revenue	12,707	8,550	35,572	34,393
Service
Total revenue	4,933	3,758	12,954	9,909
Total cost of revenue	4,576	2,600	13,616	8,380
Distribution rights
Total revenue	$ 118	$ 118	$ 356	$ 356