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v3.25.3

Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | --- | --- | ---
Assets |  |  |  |
Money market funds | $ 160,247 | $ 95,883 | $ 119,332 | $ 150,279
Available-for-sale debt securities | 487,568 | 617,951 |  |
U.S. treasuries |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 201,935 | 199,879 |  |
U.S. government agency securities |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 69,317 | 158,871 |  |
Corporate debt securities |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 216,316 | 259,201 |  |
Recurring Fair Value Measurements |  |  |  |
Assets |  |  |  |
Total assets | 629,951 | 701,677 |  |
Recurring Fair Value Measurements | Money market funds |  |  |  |
Assets |  |  |  |
Money market funds | 142,383 | 83,726 |  |
Recurring Fair Value Measurements | U.S. treasuries |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 201,935 | 199,879 |  |
Recurring Fair Value Measurements | U.S. government agency securities |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 69,317 | 158,871 |  |
Recurring Fair Value Measurements | Corporate debt securities |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 216,316 | 259,201 |  |
Recurring Fair Value Measurements | Level 1 |  |  |  |
Assets |  |  |  |
Total assets | 142,383 | 83,726 |  |
Recurring Fair Value Measurements | Level 1 | Money market funds |  |  |  |
Assets |  |  |  |
Money market funds | 142,383 | 83,726 |  |
Recurring Fair Value Measurements | Level 1 | U.S. treasuries |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 0 | 0 |  |
Recurring Fair Value Measurements | Level 1 | U.S. government agency securities |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 0 | 0 |  |
Recurring Fair Value Measurements | Level 1 | Corporate debt securities |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 0 | 0 |  |
Recurring Fair Value Measurements | Level 2 |  |  |  |
Assets |  |  |  |
Total assets | 487,568 | 617,951 |  |
Recurring Fair Value Measurements | Level 2 | Money market funds |  |  |  |
Assets |  |  |  |
Money market funds | 0 | 0 |  |
Recurring Fair Value Measurements | Level 2 | U.S. treasuries |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 201,935 | 199,879 |  |
Recurring Fair Value Measurements | Level 2 | U.S. government agency securities |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 69,317 | 158,871 |  |
Recurring Fair Value Measurements | Level 2 | Corporate debt securities |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 216,316 | 259,201 |  |
Recurring Fair Value Measurements | Level 3 |  |  |  |
Assets |  |  |  |
Total assets | 0 | 0 |  |
Recurring Fair Value Measurements | Level 3 | Money market funds |  |  |  |
Assets |  |  |  |
Money market funds | 0 | 0 |  |
Recurring Fair Value Measurements | Level 3 | U.S. treasuries |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 0 | 0 |  |
Recurring Fair Value Measurements | Level 3 | U.S. government agency securities |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | 0 | 0 |  |
Recurring Fair Value Measurements | Level 3 | Corporate debt securities |  |  |  |
Assets |  |  |  |
Available-for-sale debt securities | $ 0 | $ 0 |  |

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