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Investments - Additional Information (Detail) - USD ($) | 6 Months Ended |
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Jun. 30, 2025 | Dec. 31, 2024
Unrealized Losses On Short Term And Long Term Investments [Line Items] |  |
Minimum period for which failed auction securities been in unrealized loss position | 12 months |
Failed Auction Security [Member] |  |
Unrealized Losses On Short Term And Long Term Investments [Line Items] |  |
Amortized cost of securities | $ 3,000,000 | $ 3,000,000
Period for which failed auction securities been in unrealized loss position | exceeds 12 months |
Estimated Fair Value | $ 2,584,000 | $ 2,641,000

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