Research, Collaboration and Licensing Agreements - Additional Information - Strategic Partnership Revenue (Detail) - USD ($)	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contract assets	$ 0		$ 0
Performance obligation recognized	0	$ 0
Bei Gene
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Deferred revenue	$ 32,941,000		$ 32,941,000

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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