Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Collaboration revenue	$ 16,627	$ 28,935
Type of Revenue [Extensible List]	us-gaap:LicenseAndServiceMember	us-gaap:LicenseAndServiceMember
Operating expenses:
Research and development	$ 108,427	$ 111,847
General and administrative	29,007	31,091
Total operating expenses	137,434	142,938
Operating loss	(120,807)	(114,003)
Other income (expense), net:
Interest income	8,603	12,632
Change in fair value of investments, net	(2,125)	(6,065)
Total other income , net	6,478	6,567
Net loss	$ (114,329)	$ (107,436)
Net loss per share, basic	$ (1.1)	$ (1.12)
Net loss per share, diluted	$ (1.1)	$ (1.12)
Weighted average shares outstanding, basic	103,500	95,502
Weighted average shares outstanding, diluted	103,500	95,502
Other comprehensive loss:
Unrealized gain (loss) on marketable securities	$ 452	$ (821)
Comprehensive loss	$ (113,877)	$ (108,257)