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Summary of Other Non-current Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Prepaid Expense and Other Assets, Noncurrent [Abstract]    
Non-current inventory $ 129,521 $ 0
Manufacturing-related deposits and prepaids 112,765 148,525
Strategic investments 34,892 38,799
Restricted cash and investments 9,904 9,315
Prepaid clinical expenses 2,007 3,395
Other 3,860 3,669
Total other non-current assets $ 292,949 $ 203,703