Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, net	$ 190,872	$ 267,465	$ 382,329
Cost of goods sold	144,671	179,692	216,049
Gross profit	46,201	87,773	166,280
Operating expenses
Research and development	43,399	49,903	35,365
Sales and marketing	10,060	9,141	8,702
General and administrative	41,489	39,497	35,262
Total operating expenses	94,948	98,541	79,329
Income (loss) from operations	(48,747)	(10,768)	86,951
Other income (expense)
Interest income	925	282	221
Interest expense	(5,405)	(1,106)	(858)
Other income, net	1,840	1,814	(1,788)
Total other income (expense), net	(2,640)	990	(2,425)
Income (loss) before income taxes	(51,387)	(9,778)	84,526
Income tax benefit (expense)	(14,662)	7,632	(10,575)
Net income (loss)	$ (66,049)	$ (2,146)	$ 73,951
Net income (loss) per share
Basic (in dollars per share)	$ (3.31)	$ (0.11)	$ 3.87
Diluted (in dollars per share)	$ (3.31)	$ (0.11)	$ 3.67
Weighted average shares used to compute net income (loss) per share:
Basic (in shares)	19,982,363	19,646,646	19,097,355
Diluted (in shares)	19,982,363	19,646,646	20,139,105