Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue, net	$ 53,267	$ 76,608	$ 157,157	$ 182,298
Cost of goods sold	45,143	57,418	127,537	143,034
Gross profit	8,124	19,190	29,620	39,264
Operating expenses
Research and development	10,149	11,206	31,990	32,567
Sales and marketing	2,783	4,491	8,576	10,858
General and administrative	10,645	10,272	32,195	31,520
Total operating expenses	23,577	25,969	72,761	74,945
Loss from operations	(15,453)	(6,779)	(43,141)	(35,681)
Other income (expense)
Interest income	17	26	49	220
Interest expense	(1,359)	(1,480)	(4,158)	(4,424)
Other income (expense), net	998	866	7,628	2,096
Total other income (expense), net	(344)	(588)	3,519	(2,108)
Loss before income taxes	(15,797)	(7,367)	(39,622)	(37,789)
Income tax expense	0	(2,249)	0	(7,224)
Net loss	$ (15,797)	$ (9,616)	$ (39,622)	$ (45,013)
Net loss per share
Basic (in dollars per share)	$ (0.58)	$ (0.42)	$ (1.48)	$ (2.12)
Diluted (in dollars per share)	$ (0.58)	$ (0.42)	$ (1.48)	$ (2.12)
Weighted average shares used to compute net loss per share:
Basic (in shares)	27,097,372	22,744,361	26,791,415	21,275,778
Diluted (in shares)	27,097,372	22,744,361	26,791,415	21,275,778