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Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Total financial assets $ 29,834 $ 52,866
Fair Value, Inputs, Level 1 [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Total financial assets 29,834 52,866
Money Market Funds And Other Cash Equivalents [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Total financial assets 29,834 52,866
Money Market Funds And Other Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Total financial assets $ 29,834 $ 52,866