Condensed Statements of Stockholders' Equity (Deficit) (unaudited) - USD ($) $ in Thousands	Total	Follow On Offering	Common Stock	Common Stock Follow On Offering	Additional Paid-In Capital	Additional Paid-In Capital Follow On Offering	Accumulated Other Comprehensive (Loss)	Accumulated Deficit
Beginning balances at Dec. 31, 2020	$ 53,839		$ 3		$ 221,904		$ 3	$ (168,071)
Beginning balances, shares at Dec. 31, 2020			25,553,172
Issuance of common stock		$ 107,582		$ 1		$ 107,581
Issuance of common stock, shares				6,764,704
Issuance of common stock under equity incentive plans including exercise of stock options	561				561
Issuance of common stock under equity incentive plans including exercise of stock options, shares			113,538
Vesting of early exercised stock options	6				6
Vesting of early exercised stock options, shares			7,319
Stock-based compensation	2,136				2,136
Net loss	(61,724)							(61,724)
Unrealized (loss) gain on marketable securities	(20)						(20)
Ending balance at Mar. 31, 2021	102,380		$ 4		332,188		(17)	(229,795)
Ending balance, shares at Mar. 31, 2021			32,438,733
Beginning balances at Dec. 31, 2021	58,070		$ 4		342,905		(47)	(284,792)
Beginning balances, shares at Dec. 31, 2021			32,765,788
Issuance of common stock under equity incentive plans including exercise of stock options	830				830
Issuance of common stock under equity incentive plans including exercise of stock options, shares			309,905
Vesting of early exercised stock options	3				3
Vesting of early exercised stock options, shares			1,728
Stock-based compensation	2,843				2,843
Net loss	(20,321)							(20,321)
Unrealized (loss) gain on marketable securities	(41)						(41)
Ending balance at Mar. 31, 2022	$ 41,384		$ 4		$ 346,581		$ (88)	$ (305,113)
Ending balance, shares at Mar. 31, 2022			33,077,421