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Marketable Securities - Summary of Available-for-Sale Debt Securities in Unrealized Loss Position and Included in Accumulated Other Comprehensive (Loss), Aggregated by Length of Time Investments (Detail) - USD ($) $ in Thousands | May 31, 2024 | May 31, 2023
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Investments, Debt and Equity Securities [Abstract] |  |
Total investments with unrealized losses, fair value | $ 25,464 | $ 24,245
Unrealized losses with a loss position for less than 12 months, fair value | 4,866 | 6,285
Unrealized losses with a loss position for more than 12 months, fair value | 20,598 | 17,960
Total investments with unrealized losses, gross unrealized losses | (1,796) | (1,855)
Unrealized losses with a loss position for less than 12 months, gross unrealized losses | (36) | (72)
Unrealized losses with a loss position for more than 12 months, gross unrealized losses | $ (1,760) | $ (1,783)

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