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Collaboration Agreements, License Agreement and Revenues - Transaction Price Related to Consideration Received and Accounts Receivable Allocated to Performance Obligations Deferred Revenue (Parenthetical) (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Revenue Recognition Multiple Deliverable Arrangements [Line Items]    
Deferred revenue, net of current $ 186,801 $ 138,474
Deferred Revenue 58,909 2,147
Net unbilled co-development revenue 8,000 0
AstraZeneca Agreements [Member]    
Revenue Recognition Multiple Deliverable Arrangements [Line Items]    
Deferred Revenue 171,516 $ 137,338
Net unbilled co-development revenue 9,100  
AstraZeneca Agreements [Member] | U.S./RoW [Member]    
Revenue Recognition Multiple Deliverable Arrangements [Line Items]    
Deferred revenue, net of current 162,400  
Deferred Revenue 171,500  
Net unbilled co-development revenue $ 9,100