Condensed Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Public Offering	Common Stock	Common Stock Public Offering	Additional Paid-in Capital	Additional Paid-in Capital Public Offering	Accumulated Other Comprehensive Loss	Accumulated Deficit
Balance at Dec. 31, 2020	$ 306,223		$ 4		$ 372,764		$ (5)	$ (66,540)
Balance, Shares at Dec. 31, 2020			37,569
Issuance of common stock upon exercise of stock options	24				24
Issuance of common stock upon exercise of stock options, Shares			31
Vesting of early exercise options	10				10
Stock-based compensation	3,701				3,701
Net loss	(23,844)							(23,844)
Other comprehensive gain (loss)	2						2
Balance at Mar. 31, 2021	286,116		$ 4		376,499		(3)	(90,384)
Balance, Shares at Mar. 31, 2021			37,600
Balance at Dec. 31, 2021	381,430		$ 5		566,161		(187)	(184,549)
Balance, Shares at Dec. 31, 2021			47,754
Issuance of common stock upon exercise of stock options	$ 10				10
Issuance of common stock upon exercise of stock options, Shares	7		7
Vesting of early exercise options	$ 1				1
Issuance of common stock in public offerings, net of issuance costs of $745		$ 24,103				$ 24,103
Issuance of stock, net of issuance costs, Shares				1,520
Stock-based compensation	6,238				6,238
Net loss	(34,235)							(34,235)
Other comprehensive gain (loss)	(1,839)						(1,839)
Balance at Mar. 31, 2022	$ 375,708		$ 5		$ 596,513		$ (2,026)	$ (218,784)
Balance, Shares at Mar. 31, 2022			49,281