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Cash Equivalents and Investments - Schedule of Investments (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Available-for-sale [Line Items] |  |
Available-for-sale Securities | $ 123,042 | $ 118,566
Corporate securities |  |
Available-for-sale [Line Items] |  |
Available-for-sale Securities | 50,467 | 46,411
U.S. Treasury securities [Member] |  |
Available-for-sale [Line Items] |  |
Available-for-sale Securities | 42,506 | 40,590
Municipal Debt Securities [Member] |  |
Available-for-sale [Line Items] |  |
Available-for-sale Securities | 21,263 | 22,294
Federal Home Loan Securities [Member] |  |
Available-for-sale [Line Items] |  |
Available-for-sale Securities | 6,792 | 6,640
Certificates of Deposit [Member] |  |
Available-for-sale [Line Items] |  |
Available-for-sale Securities | $ 2,014 | $ 2,631

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