Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Collaboration revenue	$ 23,385	$ 50,931	$ 27,941
Operating expenses
Research and development	129,508	89,536	58,158
General and administrative	28,306	23,897	20,051
Total operating expenses	157,814	113,433	78,209
Loss from operations	(134,429)	(62,502)	(50,268)
Interest income and other income (expense), net	21,468	3,847	506
Net loss	(112,961)	(58,655)	(49,762)
Unrealized gains (losses) on marketable securities	3,433	(2,159)	(719)
Comprehensive loss	$ (109,528)	$ (60,814)	$ (50,481)
Net loss per common share, basic	$ (1.96)	$ (1.42)	$ (1.41)
Net loss per common share, diluted	$ (1.96)	$ (1.42)	$ (1.41)
Weighted-average number of common shares outstanding used in computing net loss per share, basic	57,519,929	41,444,696	35,252,443
Weighted-average number of common shares outstanding used in computing net loss per share, diluted	57,519,929	41,444,696	35,252,443