Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	July 2021 Offering	CONVERTIBLE PREFERRED STOCK SERIES SEED	CONVERTIBLE PREFERRED STOCK SERIES A	CONVERTIBLE PREFERRED STOCK SERIES B	COMMON STOCK	COMMON STOCK July 2021 Offering	ADDITIONAL PAID-IN CAPITAL	ADDITIONAL PAID-IN CAPITAL July 2021 Offering	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	ACCUMULATED DEFICIT
Beginning balance at Dec. 31, 2019	$ (48,848)					$ 1		$ 5,872		$ 32	$ (54,753)
Beginning balance, shares at Dec. 31, 2019						702,510
Beginning balance, convertible preferred stock at Dec. 31, 2019			$ 1,460	$ 30,729	$ 45,575
Beginning balance, convertible preferred stock, shares at Dec. 31, 2019			2,712,960	31,499,040	26,321,313
Issuance of Series B convertible preferred stock, net of issuance costs and beneficial conversion charge	7,858				$ 9,271			7,858
Issuance of Series B convertible preferred stock, net of issuance costs and beneficial conversion charge, shares					9,845,348
Accretion of Series B converted preferred stock	(7,858)							(7,858)
Accretion of Series B converted preferred stock					$ 7,858
Conversion of convertible preferred stock into common stock	94,893		$ (1,460)	$ (30,729)	$ (62,704)	$ 11		94,882
Conversion of convertible preferred stock into common stock, shares			(2,712,960)	(31,499,040)	(36,166,661)	11,172,955
Initial public offering, net of underwriting discounts, commissions and offering costs	76,526					$ 6		76,520
Initial public offering, net of underwriting discounts, commissions and offering costs, shares						5,405,000
Exercise of stock options and issuance of stock under the Employee Stock Purchase Plan	1,021							1,021
Exercise of stock options and issuance of stock under the Employee Stock Purchase Plan, shares						267,798
Stock-based compensation expense	2,231							2,231
Unrealized loss on investments	(28)									(28)
Net loss	(41,360)										(41,360)
Ending balance at Dec. 31, 2020	84,435					$ 18		180,526		4	(96,113)
Ending balance, shares at Dec. 31, 2020						17,548,263
Issuance of common stock under ATM offering, net of issuance costs		$ 48,240					$ 9		$ 48,231
Issuance of common stock under ATM offering, net of issuance costs, shares							8,564,624
Exercise of stock options and issuance of stock under the Employee Stock Purchase Plan	914							914
Exercise of stock options and issuance of stock under the Employee Stock Purchase Plan, shares						174,377
Stock-based compensation expense	3,845							3,845
Unrealized loss on investments	(20)									(20)
Net loss	(51,384)										(51,384)
Ending balance at Dec. 31, 2021	$ 86,030					$ 27		$ 233,516		$ (16)	$ (147,497)
Ending balance, shares at Dec. 31, 2021						26,287,264