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Cash Equivalents and Investments - Schedule of Investments (Detail) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Available-for-sale [Line Items] |  |
Available-for-sale Securities | $ 116,621 | $ 104,485
Corporate securities |  |
Available-for-sale [Line Items] |  |
Available-for-sale Securities | 50,602 | 57,878
U.S. Treasury securities [Member] |  |
Available-for-sale [Line Items] |  |
Available-for-sale Securities | 35,105 | 22,674
Municipal Debt Securities [Member] |  |
Available-for-sale [Line Items] |  |
Available-for-sale Securities | 21,508 | 14,649
Federal Home Loan Securities [Member] |  |
Available-for-sale [Line Items] |  |
Available-for-sale Securities | 6,673 | 5,670
Certificates of Deposit [Member] |  |
Available-for-sale [Line Items] |  |
Available-for-sale Securities | $ 2,733 | $ 3,614

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