Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue, net	$ 40,467	$ 52,719
Cost of goods sold	34,129	40,368
Gross profit	6,338	12,351
Operating expenses
Research and development	10,558	11,185
Sales and marketing	2,936	2,595
General and administrative	10,638	10,440
Total operating expenses	24,132	24,220
Loss from operations	(17,794)	(11,869)
Other income (expense)
Interest income	147	72
Interest expense	(1,455)	(996)
Other income (expense), net	256	(155)
Total other income (expense), net	(1,052)	(1,079)
Loss before income taxes	(18,846)	(12,948)
Income tax benefit	2,049	2,474
Net loss	$ (16,797)	$ (10,474)
Net loss per share
Basic (in dollars per share)	$ (0.83)	$ (0.53)
Diluted (in dollars per share)	$ (0.83)	$ (0.53)
Weighted average shares used to compute net loss per share:
Basic (in shares)	20,208,383	19,863,090
Diluted (in shares)	20,208,383	19,863,090