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Non-Marketable Equity Securities - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 5 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Sep. 30, 2021
Equity Securities, FV-NI, Unrealized Gain (Loss)   $ (645) $ (645)
Other Expense [Member]      
Equity Securities, FV-NI, Unrealized Gain (Loss) $ 364