CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total		Convertible Preferred Stock	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Deficit
Convertible Preferred Stock Beginning balance, Shares at Dec. 31, 2019			17,031,887
Convertible Preferred Stock Beginning balance at Dec. 31, 2019			$ 281,342
Beginning balance, Shares at Dec. 31, 2019				1,179,296
Beginning balance at Dec. 31, 2019	$ (208,914)			$ 2	$ (51)	$ 8,015	$ (216,880)
Exercise of stock options	44					44
Exercise of stock options, Shares				21,039
Stock-based compensation	1,644					1,644
Net loss	$ (46,665)						(46,665)
Convertible Preferred Stock Ending balance, Shares at Dec. 31, 2020	17,031,887		17,031,887
Convertible Preferred Stock Ending balance at Dec. 31, 2020	$ 281,342	[1]	$ 281,342
Ending balance, Shares at Dec. 31, 2020				1,200,335
Ending balance at Dec. 31, 2020	(253,891)			$ 2	(51)	9,703	(263,545)
Conversion of convertible preferred stock into common stock on initial public offering			$ (281,342)
Conversion of convertible preferred stock into common stock on initial public offering, shares			(17,031,887)
Conversion of convertible preferred stock into common stock on initial public offering	281,342			$ 17		281,325
Conversion of convertible preferred stock into common stock on initial public offering, shares				17,031,887
Settlement of outstanding forward obligation into common stock on initial public offering	2,698					2,698
Settlement of outstanding forward obligation into common stock on initial public offering, shares				224,842
Issuance of common stock in initial public offering, net of discounts and offering costs of $9.8 million	83,792			$ 7		83,785
Issuance of common stock in initial public offering, net of discounts and offering costs of $9.8 million, shares				7,800,000
Reclassification of convertible preferred stock warrant into common stock warrant on initial public offering	3,978					3,978
Exercise of stock options	271					271
Exercise of stock options, Shares				79,472
Stock-based compensation	2,372					2,372
Net loss	(48,499)						(48,499)
Convertible Preferred Stock Ending balance, Shares at Dec. 31, 2021			0
Ending balance, Shares at Dec. 31, 2021				26,336,536
Ending balance at Dec. 31, 2021	$ 72,063			$ 26	$ (51)	$ 384,132	$ (312,044)

[1] The carrying value reflects the gross proceeds received from the sale of the preferred stock net of issuance costs and the fair value at issuance of preferred stock warrants classified as a liability