Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue	$ 9,685	$ 7,572
Operating expenses:
Research and development	(96,936)	(77,549)
General and administrative	(39,949)	(27,558)
Total operating expenses	(136,885)	(105,107)
Loss from operations	(127,200)	(97,535)
Interest and other income (expense), net	4,670	272
Interest expense	(791)	0
Net loss	(123,321)	(97,263)
Net loss attributable to common stockholders	(123,321)	(97,263)
Net loss attributable to common stockholders	$ (123,321)	$ (97,263)
Net loss per share, attributable to common stockholders:
Basic (USD per share)	$ (2.94)	$ (2.71)
Diluted (USD per share)	$ (2.94)	$ (2.71)
Shares used in computing net loss per share attributable to common stockholders:
Basic (in shares)	42,015,908	35,846,421
Diluted (in shares)	42,015,908	35,846,421
Comprehensive loss:
Net loss	$ (123,321)	$ (97,263)
Other comprehensive loss:
Net unrealized loss on short-term investments	(1,757)	(169)
Total other comprehensive loss	(1,757)	(169)
Comprehensive loss	$ (125,078)	$ (97,432)