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		$ 1,695	$ 1,307	$ 4,778	$ 3,853
Cost of revenue		654	307	1,858	873
Total gross profit		1,041	1,000	2,920	2,980
Operating expenses:
Research and development		7,507	6,313	21,799	19,268
General and administrative		5,925	2,801	13,566	7,831
Sales and marketing		2,773	1,679	5,982	3,975
Total operating expenses		16,205	10,793	41,347	31,074
Loss from operations		(15,164)	(9,793)	(38,427)	(28,094)
Other income (expense), net:
Interest expense		(1,069)	(205)	(3,588)	(590)
Government assistance		0	4,560	0	9,146
Gain on investment in marketable securities		0	1,164	0	1,164
Change in fair value of warrant liabilities		2,603	0	2,603	0
Lincoln Park Purchase Agreement issuance costs		(629)	0	(629)	0
Other income, net		948	65	1,301	669
Total other income, net		1,853	5,584	(313)	10,389
Net loss		$ (13,311)	$ (4,209)	$ (38,740)	$ (17,705)
Net loss per share, basic (in usd per share)		$ (0.11)	$ (0.03)	$ (0.32)	$ (0.14)
Net loss per share, diluted (in usd per share)		$ (0.11)	$ (0.03)	$ (0.32)	$ (0.14)
Weighted-average shares used in computing net loss per share, basic (in shares)	[1]	116,256,805	125,362,390	122,337,727	125,331,065
Weighted-average shares used in computing net loss per share, diluted (in shares)	[1]	116,256,805	125,362,390	122,337,727	125,331,065
Comprehensive loss:
Net loss		$ (13,311)	$ (4,209)	$ (38,740)	$ (17,705)
Foreign currency translation adjustment, net of tax		56	29	18	40
Net comprehensive loss		$ (13,255)	$ (4,180)	$ (38,722)	$ (17,665)

[1] Weighted-average shares have been retroactively restated to give effect to the Merger.