Consolidated Statements of Operations and Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenue	$ 91,386	$ 52,959	$ 160,768	$ 93,311
Cost of goods sold	14,173	7,518	24,177	13,499
Gross profit	77,213	45,441	136,591	79,812
Operating expenses:
Research and development	14,534	9,288	26,404	17,442
Selling, general and administrative	76,686	48,697	140,250	90,603
Total operating expenses	91,220	57,985	166,654	108,045
Operating loss	(14,007)	(12,544)	(30,063)	(28,233)
Other expense (income):
Interest and dividend income	(297)	(31)	(331)	(88)
Interest expense	494	530	1,021	1,053
Other expense, net	144	19	189	57
Total other expense	341	518	879	1,022
Loss before income taxes	(14,348)	(13,062)	(30,942)	(29,255)
Income taxes	142	26	242	49
Net loss	(14,490)	(13,088)	(31,184)	(29,304)
Other comprehensive loss:
Foreign currency translation gain	42	0	42	0
Unrealized loss on investments	(45)	(21)	(188)	(41)
Total comprehensive loss	$ (14,493)	$ (13,109)	$ (31,330)	$ (29,345)
Net loss per share, basic (in dollars per share)	$ (0.53)	$ (0.48)	$ (1.13)	$ (1.08)
Net loss per share, diluted (in dollars per share)	$ (0.53)	$ (0.48)	$ (1.13)	$ (1.08)
Weighted average common shares used to compute net loss per share, basic (in shares)	27,594,874	27,230,044	27,556,286	27,187,438
Weighted average common shares used to compute net loss per share, diluted (in shares)	27,594,874	27,230,044	27,556,286	27,187,438