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Fair Value Measurements and Marketable Securities - Summary of Cash Equivalents and Marketable Securities (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Cash equivalents | $ 85,402 | $ 26,702
Marketable securities | 85,295 | 150,236
Total cash equivalents and marketable securities | 170,697 | 176,938
US Treasury Bills [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities | 4,992 | 2,947
U.S. Government Securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities | 80,303 | 147,289
Money Market Funds [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Cash equivalents | 85,402 | 26,702
Quoted Prices in Active Markets, (Level 1) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Cash equivalents | 85,402 | 26,702
Marketable securities | 4,992 | 2,947
Total cash equivalents and marketable securities | 90,394 | 29,649
Quoted Prices in Active Markets, (Level 1) [Member] | US Treasury Bills [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities | 4,992 | 2,947
Quoted Prices in Active Markets, (Level 1) [Member] | Money Market Funds [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Cash equivalents | 85,402 | 26,702
Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities | 80,303 | 147,289
Total cash equivalents and marketable securities | 80,303 | 147,289
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government Securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities | $ 80,303 | $ 147,289

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