Consolidated statements of changes in redeemable convertible preferred stock and stockholders' equity (deficit) - USD ($) $ in Thousands	Total	Initial Public Offering	Green House Initial Public Offering	Series A	Series A Initial Public Offering	Series B-1	Series B-1 Initial Public Offering	Series B-2	Series B-2 Initial Public Offering	Common Stock	Common Stock Initial Public Offering	Common Stock Green House Initial Public Offering	Additional Paid-in Capital	Additional Paid-in Capital Initial Public Offering	Additional Paid-in Capital Green House Initial Public Offering	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2019	$ (64,891)									$ 0			$ 1,421			$ (66,197)	$ (115)
Beginning balance, Shares at Dec. 31, 2019	10,819,843					8,344,034
Beginning balance at Dec. 31, 2019	$ 100,695					$ 81,384
Beginning balance, Shares at Dec. 31, 2019										3,927,803
Issuance of common stock upon exercise of stock options	261									$ 0			261
Issuance of common stock upon exercise of stock options, shares										188,594
Vesting of early exercised common stock	363												363
Issuance of Series A redeemable convertible stock upon exercise of Series A warrants				$ 1,262
Issuance of Series A redeemable convertible stock upon exercise of Series A warrants, shares				120,702
Issuance of redeemable convertible preferred stock								$ 40,000
Issuance of redeemable convertible preferred stock, shares								3,569,630
Reclassification of Series A warrant and convertible preferred stock liabilities to equity				$ 620				$ 14,560
Reclassification of Series A warrant and convertible preferred stock liabilities to equity, shares					(10,940,545)
Conversion of redeemable convertible preferred stock to common stock		$ 238,523			$ (102,577)		$ (81,384)		$ (54,560)		$ 3			$ 238,520
Conversion of redeemable convertible preferred stock to common stock, shares							(8,344,034)		(3,569,630)		22,854,209
Issuance of common stock		$ 139,500	$ 16,043								$ 1	$ 0		$ 139,499	$ 16,042
Issuance of common stock, shares											10,000,000	1,150,000
Costs related to the follow-on offering	(4,116)												(4,116)
Stock-based compensation	2,975												2,975
Other comprehensive loss	(73)																(73)
Net loss	(108,543)															(108,543)
Ending balance at Dec. 31, 2020	220,039									$ 4			394,963			(174,740)	(188)
Ending balance, Shares at Dec. 31, 2020										38,120,606
Issuance of common stock upon exercise of stock options	394												394
Issuance of common stock upon exercise of stock options, shares										124,013
Stock Issued During Period, Value, Employee Stock Purchase Plan	653												653
Stock Issued During Period, Shares, Employee Stock Purchase Plans										45,610
Stock-based compensation expense related to employee stock awards	12,541												12,541
Stock-based compensation expense related to employee stock purchases	795												795
Vesting of early exercised common stock	292												292
Issuance of common stock	78,584												78,584
Issuance of common stock, shares										4,400,000
Costs related to the follow-on offering	(875)												(875)
Other comprehensive loss	640																640
Net loss	(128,332)															(128,332)
Ending balance at Dec. 31, 2021	$ 184,731									$ 4			$ 487,347			$ (303,072)	$ 452
Ending balance, Shares at Dec. 31, 2021										42,690,229