CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Collaboration revenue	$ 1,614	$ 19,570	$ 24,122	$ 173,384
Operating expenses:
Research and development	38,361	31,257	108,312	91,900
General and administrative	10,304	9,971	31,500	28,606
Total operating expenses	48,665	41,228	139,812	120,506
(Loss) income from operations	(47,051)	(21,658)	(115,690)	52,878
Other income:
Interest and other income	3,571	5,766	11,936	14,346
Total other income	3,571	5,766	11,936	14,346
(Loss) income before provision for income taxes	(43,480)	(15,892)	(103,754)	67,224
Provision for (benefit from) income taxes	654	(1,860)	832	2,729
Net (loss) income	$ (44,134)	$ (14,032)	$ (104,586)	$ 64,495
Net (loss) income per share, basic (in dollars per share)	$ (1.06)	$ (0.35)	$ (2.53)	$ 1.79
Net (loss) income per share, diluted (in dollars per share)	$ (1.06)	$ (0.35)	$ (2.53)	$ 1.72
Weighted-average common shares outstanding, basic (in shares)	41,462,567	40,629,602	41,293,108	36,118,930
Weighted-average common shares outstanding, diluted (in shares)	41,462,567	40,629,602	41,293,108	37,583,486
Other comprehensive income:
Unrealized gain on marketable securities	$ 221	$ 1,301	$ 664	$ 777
Total other comprehensive income	221	1,301	664	777
Total comprehensive (loss) income	$ (43,913)	$ (12,731)	$ (103,922)	$ 65,272