Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue:
Total revenue	$ 2,155	$ 72	$ 3,551	$ 320
Cost of revenue:
Total cost of revenue	986	0	1,572	0
Gross profit	1,169	72	1,979	320
Operating expenses:
Research and development	7,745	4,762	20,906	13,520
Selling, general and administrative	11,855	3,726	32,672	7,408
Total operating expenses	19,600	8,488	53,578	20,928
Loss from operations	(18,431)	(8,416)	(51,599)	(20,608)
Other income (expense):
Interest income	46	196	169	778
Other expense	0	(9)	0	(9)
Total other income	46	187	169	769
Net loss	(18,385)	(8,229)	(51,430)	(19,839)
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities	26	(159)	(62)	119
Comprehensive loss	$ (18,359)	$ (8,388)	$ (51,492)	$ (19,720)
Net loss per share attributable to common shareholders, basic (in usd per share)	$ (0.30)	$ (0.80)	$ (0.85)	$ (2.04)
Net loss per share attributable to common shareholders, diluted (in usd per share)	$ (0.30)	$ (0.80)	$ (0.85)	$ (2.04)
Weighted-average common shares outstanding, basic (in shares)	61,133,518	10,285,401	60,625,601	9,709,501
Weighted average number of shares outstanding, diluted (in shares)	61,133,518	10,285,401	60,625,601	9,709,501
Product
Revenue:
Total revenue	$ 858	$ 0	$ 1,695	$ 0
Cost of revenue:
Total cost of revenue	574	0	1,078	0
Service
Revenue:
Total revenue	500	0	500	0
Cost of revenue:
Total cost of revenue	42	0	42	0
Related party
Revenue:
Total revenue	787	0	1,167	0
Cost of revenue:
Total cost of revenue	370	0	452	0
Grant
Revenue:
Total revenue	$ 10	$ 72	$ 189	$ 320