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Fair Value Measurements - Summary of Financial Assets Measured at Fair Value on a Recurring Basis (Detail) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost $ 330,006 $ 251,218
Gross Unrealized Holding Gains 158 10
Gross Unrealized Holding Losses (3)  
Aggregate Fair Value 330,161 251,228
Level 1 [Member] | Cash and Cash Equivalents [Member] | Money Market Funds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 40,679 143,933
Aggregate Fair Value 40,679 143,933
Level 2 [Member] | Cash and Cash Equivalents [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 69,585 216,622
Aggregate Fair Value 69,585 216,622
Level 2 [Member] | Cash and Cash Equivalents [Member] | Government Bonds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 28,906 72,689
Aggregate Fair Value 28,906 72,689
Level 2 [Member] | Short-Term Investments [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 260,421 34,596
Gross Unrealized Holding Gains 158 10
Gross Unrealized Holding Losses (3)  
Aggregate Fair Value 260,576 34,606
Level 2 [Member] | Short-Term Investments [Member] | Government Bonds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 260,421 34,596
Gross Unrealized Holding Gains 158 10
Gross Unrealized Holding Losses (3)  
Aggregate Fair Value $ 260,576 $ 34,606