License and Collaboration Agreements - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
License And Collaboration Agreements [Line Items]
Research and development costs	$ 35,506	$ 33,821	$ 102,411	$ 113,308
General and administrative expense	13,349	10,982	39,460	31,856
Harbour License Agreement
License And Collaboration Agreements [Line Items]
Upfront license fee				25,000
Harbour BioMed US Inc. | Harbour License Agreement
License And Collaboration Agreements [Line Items]
Upfront license fee			$ 25,000
Pearl - Taiho
License And Collaboration Agreements [Line Items]
Percentage of profits from potential sales			50.00%
Research and development expense related to share of costs		5,400	$ 17,600	15,600
General and administrative expense related to share of costs	6,500
Accrued expenses and other current liabilities	5,000		5,000		$ 7,900
Research and development costs		2,000		5,100
General and administrative expense	700		700
Cullinan [Member]
License And Collaboration Agreements [Line Items]
General and administrative expense	$ 2,200		$ 6,900
Adimab | Collaboration Agreements
License And Collaboration Agreements [Line Items]
Research and development costs		$ 500		500
MIT | Collaboration Agreements
License And Collaboration Agreements [Line Items]
Research and development costs				$ 200