Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue, net	$ 76,608	$ 46,084	$ 182,298	$ 142,214
Cost of goods sold	57,418	34,108	143,034	107,349
Gross profit	19,190	11,976	39,264	34,865
Operating expenses
Research and development	11,206	10,466	32,567	32,802
Sales and marketing	4,491	2,518	10,858	7,444
General and administrative	10,272	9,988	31,520	31,312
Total operating expenses	25,969	22,972	74,945	71,558
Loss from operations	(6,779)	(10,996)	(35,681)	(36,693)
Other income (expense)
Interest income	26	347	220	729
Interest expense	(1,480)	(1,517)	(4,424)	(4,003)
Other income (expense), net	866	1,446	2,096	1,742
Total other income (expense), net	(588)	276	(2,108)	(1,532)
Loss before income taxes	(7,367)	(10,720)	(37,789)	(38,225)
Income tax benefit (expense)	(2,249)	1,940	(7,224)	7,605
Net loss	$ (9,616)	$ (8,780)	$ (45,013)	$ (30,620)
Net loss per share
Basic (in dollars per share)	$ (0.42)	$ (0.44)	$ (2.12)	$ (1.54)
Diluted (in dollars per share)	$ (0.42)	$ (0.44)	$ (2.12)	$ (1.54)
Weighted average shares used to compute net loss per share:
Basic (in shares)	22,744,361	20,022,520	21,275,778	19,939,605
Diluted (in shares)	22,744,361	20,022,520	21,275,778	19,939,605