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]
Collaboration revenue	$ 1,907	$ 6,772	$ 3,536	$ 8,697
Type of Revenue [Extensible List]	us-gaap:LicenseMember	us-gaap:LicenseMember	us-gaap:LicenseMember	us-gaap:LicenseMember
Operating expenses:
Research and development	$ 27,430	$ 34,604	$ 56,566	$ 66,742
General and administrative	11,445	17,251	25,218	38,106
Total operating expenses	38,875	51,855	81,784	104,848
Loss from operations	(36,968)	(45,083)	(78,248)	(96,151)
Other income (expense):
Interest income	2,921	4,827	6,257	8,976
Change in fair value of stock price appreciation milestones	(73)	1,556	207	162
Other income	50	273	93	582
Total other income	2,898	6,656	6,557	9,720
Net loss	(34,070)	(38,427)	(71,691)	(86,431)
Other comprehensive (loss):
Unrealized loss on available-for-sale securities, net	(129)	(228)	(206)	(437)
Comprehensive loss	$ (34,199)	$ (38,655)	$ (71,897)	$ (86,868)
Net loss per common share, basic	$ (0.29)	$ (0.33)	$ (0.61)	$ (0.79)
Net loss per common share, diluted	$ (0.29)	$ (0.33)	$ (0.61)	$ (0.79)
Weighted-average common shares outstanding used to compute diluted net loss per share	118,528,046	117,468,124	118,452,214	109,286,235
Weighted-average common shares outstanding used to compute basic net loss per share	118,528,046	117,468,124	118,452,214	109,286,235