Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Revenue from collaboration agreements	$ 6,463	$ 12,006	$ 13,701	$ 15,045
Operating expenses:
Research and development	26,197	23,753	53,269	46,286
General and administrative	8,767	9,695	18,097	19,983
Restructuring	0	0	0	2,437
Total operating expenses	34,964	33,448	71,366	68,706
Loss from operations	(28,501)	(21,442)	(57,665)	(53,661)
Other income, net:
Interest and other income, net	2,481	3,726	5,323	7,584
Total other income, net	2,481	3,726	5,323	7,584
Loss before income taxes	(26,020)	(17,716)	(52,342)	(46,077)
Net loss	$ (26,020)	$ (17,716)	$ (52,342)	$ (46,077)
Net loss per share − basic (in dollars per share)	$ (0.37)	$ (0.26)	$ (0.74)	$ (0.67)
Net loss per share − diluted (in dollars per share)	$ (0.37)	$ (0.26)	$ (0.74)	$ (0.67)
Weighted-average number of shares used in computed net loss per share − basic	71,005,743	68,810,259	70,919,871	68,621,214
Weighted-average number of shares used in computed net loss per share − diluted	71,005,743	68,810,259	70,919,871	68,621,214
Other comprehensive income (loss)
Unrealized loss on marketable securities	$ (73)	$ (60)	$ (83)	$ (313)
Comprehensive loss	$ (26,093)	$ (17,776)	$ (52,425)	$ (46,390)
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]			Collaborative Arrangement [Member]	Collaborative Arrangement [Member]