Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income
Collaboration revenue	$ 4,614	$ 41,086	$ 159,947	$ 42,457
Operating expenses:
Research and development	25,863	19,337	66,416	46,213
General and administrative	8,258	7,307	25,580	22,518
Total operating expenses	34,121	26,644	91,996	68,731
Operating (loss) income	(29,507)	14,442	67,951	(26,274)
Other income, net:
Interest income	3,429	545	8,567	816
Other income		2,637	3	2,676
Total other income, net	3,429	3,182	8,570	3,492
(Loss) income before income taxes	(26,078)	17,624	76,521	(22,782)
Income tax (benefit) provision	(177)		586
Net (loss) income	(25,901)	17,624	75,935	(22,782)
Other comprehensive (loss) income:
Net unrealized (loss) gain on available-for-sale securities	(115)	27	(29)	(199)
Total other comprehensive (loss) income	(115)	27	(29)	(199)
Comprehensive (loss) income	$ (26,016)	$ 17,651	$ 75,906	$ (22,981)
Net (loss) income per share, basic	$ (0.59)	$ 0.46	$ 1.85	$ (0.59)
Net (loss) income per share, diluted	$ (0.59)	$ 0.45	$ 1.78	$ (0.59)
Weighted-average common shares outstanding, basic	43,864,838	38,507,542	40,962,116	38,292,497
Weighted-average common shares outstanding, diluted	43,864,838	39,570,394	42,610,724	38,292,497