License and Asset Purchase Agreements - Summary of License and Other Revenue - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Other revenue			$ 6,000,000
Revenue from contract with customer, license and other revenue	$ 146,033,000	$ 157,074,000	209,819,000
Antengene [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Milestone method revenue recognized		7,800,000	29,300,000
Other revenue	1,200,000	1,800,000	300,000
Menarini [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Reimbursement of Development Related Expenses	15,000,000	15,000,000
Milestone method revenue recognized	4,000,000
Initial transaction			75,000
Other revenue	800,000	400,000
Other partner
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Milestone method revenue recognized	2,500,000	2,300,000
Other revenue	500,000
License and Service [Member] | Other Current Assets [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Revenue from contract with customer, license and other revenue	1,000,000	7,800,000
License and Service [Member] | Accounts Receivable 1 [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Revenue from contract with customer, license and other revenue	9,100,000	22,500,000
License [Member] | Menarini [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Revenue from contract with customer, license and other revenue	3,500,000
License [Member] | Other partner
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Revenue from contract with customer, license and other revenue	3,400,000
Royalty [Member] | Antengene [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Revenue from contract with customer, license and other revenue	1,500,000	3,800,000	$ 800,000
Royalty [Member] | Menarini [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Revenue from contract with customer, license and other revenue	1,100,000	300,000
Royalty [Member] | FORUS Therapeutics Inc Distribution Agreement [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Revenue from contract with customer, license and other revenue		$ 5,200,000
Royalty [Member] | Other partner
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Revenue from contract with customer, license and other revenue	$ 500,000