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Business Acquisition - Summary of Estimate of Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Sep. 14, 2020
Business Acquisition [Line Items]      
Goodwill $ 48,648 $ 48,648  
Anelixis [Member]      
Business Acquisition [Line Items]      
Cash and cash equivalents     $ 11,035
Prepaid expenses and other current assets     26
Other non-current assets     11
Accounts payable     (580)
Accrued expenses and other liabilities     (205)
Deferred tax liability     (4,510)
Net identifiable assets acquired     5,777
Goodwill     48,648
Identifiable intangible assets     32,386
Net assets acquired     $ 86,811