Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Initial Public Offering	Private Placement	Common Stock	Common Stock Initial Public Offering	Common Stock Private Placement	Additional Paid-In Capital	Additional Paid-In Capital Initial Public Offering	Additional Paid-In Capital Private Placement	Accumulated Other Comprehensive Loss	Accumulated Deficit	Series A	Series B	Series C
Beginning balance (in shares) at Dec. 31, 2018												56,000,000	49,501,221	0
Beginning balance at Dec. 31, 2018												$ 61,516	$ 70,587	$ 0
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Series C redeemable preferred stock, net of issuance costs (in shares)														26,360,745
Issuance of Series C redeemable preferred stock, net of issuance costs														$ 47,947
Ending balance (in shares) at Dec. 31, 2019												56,000,000	49,501,221	26,360,745
Ending balance at Dec. 31, 2019												$ 62,468	$ 75,860	$ 47,947
Beginning balance (in shares) at Dec. 31, 2018				1,363,000
Beginning balance at Dec. 31, 2018	$ (71,469)			$ 1			$ 0			$ 0	$ (71,470)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of founders’ common stock and restricted stock awards (in shares)				440,964
Vesting of founders’ common stock and restricted stock awards	28						28
Option exercises (in shares)				42,060
Option exercises	174						174
Accretion to redemption value and cumulative dividends on redeemable convertible stock												$ 952	$ 5,273
Accretion to redemption value and cumulative dividends on redeemable convertible stock	(6,225)						(2,031)				(4,194)
Stock-based compensation expense	1,829						1,829
Net unrealized loss on short-term investments	(1)									(1)
Net loss	(631)										(631)
Ending balance (in shares) at Dec. 31, 2019				1,846,024
Ending balance at Dec. 31, 2019	(76,295)			$ 1			0			(1)	(76,295)
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Series C redeemable preferred stock, net of issuance costs (in shares)														28,527,313
Issuance of Series C redeemable preferred stock, net of issuance costs														$ 52,019
Conversion of Series A, B, C convertible preferred stock to common stock (in shares)												(56,000,000)	(49,501,221)	(54,888,058)
Conversion of Series A, B, C convertible preferred stock to common stock												$ (62,468)	$ (75,860)	$ (99,966)
Ending balance (in shares) at Dec. 31, 2020												0	0	0
Ending balance at Dec. 31, 2020												$ 0	$ 0	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon initial public offering/private placement (in shares)					10,350,000	625,000
Issuance of common stock upon initial public offering/private placement		$ 148,278	$ 10,000		$ 1			$ 148,277	$ 10,000
Conversion of Series A, B, C convertible preferred stock to common stock (in shares)				22,432,029
Conversion of Series A, B, C convertible preferred stock to common stock	238,294			$ 1			238,293				0
Vesting of founders’ common stock and restricted stock awards (in shares)				163,544
Vesting of founders’ common stock and restricted stock awards	11						11
Option exercises (in shares)				136,198
Option exercises	442						442
Stock-based compensation expense	3,895						3,895
Net unrealized loss on short-term investments	(31)									(31)
Net loss	$ (41,533)										(41,533)
Ending balance (in shares) at Dec. 31, 2020	35,552,795			35,552,795
Ending balance at Dec. 31, 2020	$ 283,061			$ 3			400,918			(32)	(117,828)
Ending balance (in shares) at Dec. 31, 2021												0	0	0
Ending balance at Dec. 31, 2021												$ 0	$ 0	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted stock awards (in shares)				103,164
Vesting of restricted stock awards	9						9
Option exercises (in shares)				427,342
Option exercises	2,984						2,984
Stock-based compensation expense	10,437						10,437
Net unrealized loss on short-term investments	(169)									(169)
Net loss	$ (97,263)										(97,263)
Ending balance (in shares) at Dec. 31, 2021	36,083,301			36,083,301
Ending balance at Dec. 31, 2021	$ 199,059			$ 3			$ 414,348			$ (201)	$ (215,091)