Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue:
Total revenue	$ 4,053	$ 3,312
Total cost of revenue	1,985	2,068
Gross profit	2,068	1,244
Operating expenses:
Research and development	14,474	10,732
Selling, general and administrative	15,039	14,298
Total operating expenses	29,513	25,030
Loss from operations	(27,445)	(23,786)
Other income (expense):
Interest income	3,717	144
Other expense	(231)	(4)
Total other income	3,486	140
Net loss	(23,959)	(23,646)
Other comprehensive loss:
Unrealized gain (loss) on available-for-sale securities	1,158	(1,691)
Comprehensive loss	$ (22,801)	$ (25,337)
Net loss per share attributable to common shareholders, basic (in usd per share)	$ (0.38)	$ (0.38)
Net loss per share attributable to common shareholders, diluted (in usd per share)	$ (0.38)	$ (0.38)
Weighted-average common shares outstanding, basic (in shares)	63,543,094	62,003,504
Weighted-average common shares outstanding, diluted (in shares)	63,543,094	62,003,504
Product
Revenue:
Total revenue	$ 2,343	$ 2,149
Total cost of revenue	1,436	1,660
Service
Revenue:
Total revenue	69	79
Total cost of revenue	7	14
Related party
Revenue:
Total revenue	1,306	1,070
Total cost of revenue	478	394
Grant and other
Revenue:
Total revenue	335	14
Total cost of revenue	$ 64	$ 0