CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenue	$ 11,204	$ 7,755	$ 30,091	$ 21,726
Cost of product revenue	7,488	5,879	21,002	16,212
Gross profit	3,716	1,876	9,089	5,514
Operating expenses:
Research and development	17,212	8,390	49,011	19,576
Sales and marketing	8,541	6,737	23,194	14,777
General and administrative	14,008	14,073	40,306	36,177
Total operating expenses	39,761	29,200	112,511	70,530
Loss from operations	(36,045)	(27,324)	(103,422)	(65,016)
Other (expense) income:
Interest income	733	165	1,231	305
Interest expense	(699)	0	(1,143)	(504)
Other income (expense), net	61	14,490	7,071	(422)
Total other expense, net	95	14,655	7,159	(621)
Loss before income taxes	(35,950)	(12,669)	(96,263)	(65,637)
Provision for income tax expense	37	0	121	0
Net loss	(35,987)	(12,669)	(96,384)	(65,637)
Other comprehensive loss
Foreign currency translation adjustments	(87)	0	(175)	0
Total comprehensive loss	$ (36,074)	$ (12,669)	$ (96,559)	$ (65,637)
Net loss per common share, basic (in dollars per share)	$ (0.20)	$ (0.08)	$ (0.55)	$ (0.53)
Net loss per common share, diluted (in dollars per share)	$ (0.20)	$ (0.08)	$ (0.55)	$ (0.53)
Weighted-average shares used to compute basic net loss per share (in shares)	181,361,354	156,647,259	175,795,093	123,175,390
Weighted-average shares used to compute diluted net loss per share (in shares)	181,361,354	156,647,259	175,795,093	123,175,390