Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities and Fair Value Measurements - Financial Assets at Fair Value on Recurring Basis (Detail)

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Marketable Securities and Fair Value Measurements - Financial Assets at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Sep. 30, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities $ 78,355 $ 152,105  
Cash and cash equivalents 22,277 24,983 $ 27,593
Marketable securities, current 57,168 118,061  
Marketable securities, non-current   8,986  
Money Market Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 20,189 24,058  
Commercial Paper      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 36,036 103,113  
United States Treasury Bills      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 22,130 14,023  
Government-Related Debt Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities   5,185  
Corporate Bonds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities   5,726  
Cash Equivalents      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Cash and cash equivalents 21,187 25,058  
Basis of Fair Value Measurements, Level 1      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 20,189 24,058  
Basis of Fair Value Measurements, Level 1 | Money Market Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 20,189 24,058  
Basis of Fair Value Measurements, Level 1 | Commercial Paper      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 0 0  
Basis of Fair Value Measurements, Level 1 | United States Treasury Bills      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 0 0  
Basis of Fair Value Measurements, Level 1 | Government-Related Debt Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities   0  
Basis of Fair Value Measurements, Level 1 | Corporate Bonds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities   0  
Basis of Fair Value Measurements, Level 2      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 58,166 128,047  
Basis of Fair Value Measurements, Level 2 | Money Market Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 0 0  
Basis of Fair Value Measurements, Level 2 | Commercial Paper      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 36,036 103,113  
Basis of Fair Value Measurements, Level 2 | United States Treasury Bills      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 22,130 14,023  
Basis of Fair Value Measurements, Level 2 | Government-Related Debt Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities   5,185  
Basis of Fair Value Measurements, Level 2 | Corporate Bonds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities   5,726  
Basis of Fair Value Measurements, Level 3      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 0 0  
Basis of Fair Value Measurements, Level 3 | Money Market Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 0 0  
Basis of Fair Value Measurements, Level 3 | Commercial Paper      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities 0 0  
Basis of Fair Value Measurements, Level 3 | United States Treasury Bills      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities $ 0 0  
Basis of Fair Value Measurements, Level 3 | Government-Related Debt Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities   0  
Basis of Fair Value Measurements, Level 3 | Corporate Bonds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total cash equivalents and marketable securities   $ 0