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Fair Value Measurements - Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Marketable Securities | $ 233,036 | $ 271,209
Fair Value, Measurements, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Carrying Value | 307,431 | 366,880
Gross Unrealized Gains | 96 | 199
Gross Unrealized Losses | (13) | (11)
Fair Value | 307,514 | 367,068
Cash Equivalents | 74,478 | 95,859
Marketable Securities | 233,036 | 271,209
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Carrying Value | 74,478 | 95,859
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 74,478 | 95,859
Cash Equivalents | 74,478 | 95,859
Marketable Securities | 0 | 0
Fair Value, Measurements, Recurring [Member] | 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] |  |
Carrying Value | 74,478 | 95,859
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 74,478 | 95,859
Cash Equivalents | 74,478 | 95,859
Marketable Securities | 0 | 0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Carrying Value | 232,953 | 271,021
Gross Unrealized Gains | 96 | 199
Gross Unrealized Losses | (13) | (11)
Fair Value | 233,036 | 271,209
Cash Equivalents | 0 | 0
Marketable Securities | 233,036 | 271,209
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commercial Paper [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Carrying Value | 76,510 | 94,817
Gross Unrealized Gains | 6 | 26
Gross Unrealized Losses | (3) | (1)
Fair Value | 76,513 | 94,842
Cash Equivalents | 0 | 0
Marketable Securities | 76,513 | 94,842
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Treasury Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Carrying Value | 128,784 | 114,599
Gross Unrealized Gains | 81 | 120
Gross Unrealized Losses | (6) | (8)
Fair Value | 128,859 | 114,711
Cash Equivalents | 0 | 0
Marketable Securities | 128,859 | 114,711
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Agency securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Carrying Value | 27,659 | 61,605
Gross Unrealized Gains | 9 | 53
Gross Unrealized Losses | (4) | (2)
Fair Value | 27,664 | 61,656
Cash Equivalents | 0 | 0
Marketable Securities | $ 27,664 | $ 61,656

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