Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net revenues	$ 297,897	$ 87,934	$ 32,581
Cost of goods sold	198,141	70,360	34,772
Gross profit (loss)	99,756	17,574	(2,191)
Research and development expenses	20,650	9,587	5,722
Selling, general and administrative expenses	74,726	34,461	17,143
Restructuring expenses	4,869	1,515	3,509
Total operating expenses	100,245	45,563	26,374
Loss from operations	(489)	(27,989)	(28,565)
Other expense, net:
Interest expense	(3,071)	(1,128)	(1,002)
Remeasurement of warrant liability	(12,503)	(1,120)	(385)
Other, net	3,629	352	(427)
Total other expense, net	(11,945)	(1,896)	(1,814)
Loss before taxes	(12,434)	(29,885)	(30,379)
Income tax expense	9	1	5
Net loss	$ (12,443)	$ (29,886)	$ (30,384)
Net loss per share available to common stockholders—basic and diluted (in dollars per share)	$ (0.29)	$ (4.75)	$ (5.57)
Weighted average common shares outstanding—basic and diluted	42,274,777	6,287,172	5,457,629