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
Revenue:
Total revenue	$ 3,955	$ 2,155	$ 10,888	$ 3,551
Total cost of revenue	2,010	986	6,090	1,572
Gross profit	1,945	1,169	4,798	1,979
Operating expenses:
Research and development	11,564	7,745	33,167	20,906
Selling, general and administrative	15,447	11,855	43,917	32,672
Total operating expenses	27,011	19,600	77,084	53,578
Loss from operations	(25,066)	(18,431)	(72,286)	(51,599)
Other income (expense):
Interest income	1,285	46	2,105	169
Other expense	(199)	0	(260)	0
Total other income	1,086	46	1,845	169
Net loss	(23,980)	(18,385)	(70,441)	(51,430)
Other comprehensive loss:
Unrealized gain (loss) on available-for-sale securities	420	26	(2,157)	(62)
Comprehensive loss	$ (23,560)	$ (18,359)	$ (72,598)	$ (51,492)
Net loss per share attributable to common shareholders, basic (in usd per share)	$ (0.38)	$ (0.30)	$ (1.13)	$ (0.85)
Net loss per share attributable to common shareholders, diluted (in usd per share)	$ (0.38)	$ (0.30)	$ (1.13)	$ (0.85)
Weighted-average common shares outstanding, basic (in shares)	62,538,983	61,133,518	62,308,314	60,625,601
Weighted-average common shares outstanding, diluted (in shares)	62,538,983	61,133,518	62,308,314	60,625,601
Product
Revenue:
Total revenue	$ 2,571	$ 858	$ 7,126	$ 1,695
Total cost of revenue	1,371	574	4,674	1,078
Service
Revenue:
Total revenue	68	500	204	500
Total cost of revenue	21	42	50	42
Related party
Revenue:
Total revenue	1,316	787	3,494	1,167
Total cost of revenue	618	370	1,366	452
Grant and other
Revenue:
Total revenue	$ 0	$ 10	$ 64	$ 189