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Net (Gain) Loss on Marketable Securities (Detail) - USD ($) $ in Thousands | 12 Months Ended
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May 31, 2025 | May 31, 2024 | May 31, 2023
Net Loss (Gain) on Marketable Securities |  |  |
Unrealized losses (gains) on marketable equity securities | $ 5,505 | $ (19,703) | $ 2,667
Realized (gains) on marketable equity securities | (10,625) | (290) | (551)
Realized losses (gains) on available-for-sale debt securities | 123 | 79 | (30)
Net (gain) loss on marketable securities | $ (4,997) | $ (19,914) | $ 2,086

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- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-14 + Details
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- Definition Amount of realized and unrealized gain (loss) on investment in marketable security. + References No definition available. + Details
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- Definition Amount of realized gain (loss) on investment in marketable security. + References No definition available. + Details
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