Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	IPO	Series A Convertible Preferred Stock	Common Stock	Common Stock IPO	Additional Paid-in Capital	Additional Paid-in Capital IPO	Accumulated Other Comprehensive Gain (Loss)	Accumulated Deficit
Balance at Dec. 31, 2018	$ (263)					$ 1,390			$ (1,653)
Balance (in shares) at Dec. 31, 2018				4,274,734
Issuance of common stock	1,440			$ 1		1,439
Issuance of common stock (in shares)				4,428,500
Net loss	(1,198)								(1,198)
Balance at Dec. 31, 2019	(21)			$ 1		2,829			(2,851)
Balance (in shares) at Dec. 31, 2019				8,703,234
Issuance of Series A convertible preferred stock, net of issuance costs of $261			$ 55,738
Issuance of Series A convertible preferred stock, net of issuance costs of $261 (in shares)			7,064,925
Issuance of common stock	10,192					10,192
Issuance of common stock (in shares)				3,175,279
Issuance of restricted stock (in shares)				74,594
Stock-based compensation expense	322					322
Net loss	(5,324)								(5,324)
Balance at Dec. 31, 2020	5,169			$ 1		13,343			(8,175)
Balance (in shares) at Dec. 31, 2020			7,064,925
Balance at Dec. 31, 2020			$ 55,738
Balance (in shares) at Dec. 31, 2020				11,953,107
Series A convertible preferred stock issuance costs			$ (3)
Issuance of common stock		$ 152,754			$ 1		$ 152,753
Issuance of common stock (in shares)					9,823,532
Issuance of restricted stock (in shares)				204,187
Conversion of Series A convertible preferred stock into common stock	55,735			$ 1		55,734
Conversion of Series A convertible preferred stock into common stock (in shares)			(7,064,925)
Conversion of Series A convertible preferred stock into common stock			$ (55,735)
Conversion of Series A convertible preferred stock into common stock (in shares)				7,064,925
Exercise of stock options	$ 254					254
Exercise of stock options, (in shares)	48,663			48,663
Purchases under employee stock purchase plan	$ 214					214
Purchases under employee stock purchase plan (in shares)				21,007
Stock-based compensation expense	6,234					6,234
Unrealized gain (loss) on investments, net	(10)							$ (10)
Net loss	(41,567)								(41,567)
Balance at Dec. 31, 2021	$ 178,783			$ 3		$ 228,532		$ (10)	$ (49,742)
Balance (in shares) at Dec. 31, 2021			0
Balance (in shares) at Dec. 31, 2021				29,115,421