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INVESTMENTS AND FAIR VALUE MEASUREMENTS - AMORTIZED COST (Details) - USD ($) $ in Thousands | Jul. 31, 2025 | Apr. 30, 2025
--- | --- | ---
Debt and Equity Securities, FV-NI |  |
Cost or Amortized Cost | $ 97,650 | $ 110,153
Unrealized Gains | 6,960 | 7,370
Unrealized Losses | (13,383) | (14,854)
Fair Value | 91,227 | 102,669
Marketable-Equity Securities | Equity securities |  |
Debt and Equity Securities, FV-NI |  |
Cost or Amortized Cost | 67,956 | 63,677
Unrealized Gains | 6,659 | 6,892
Unrealized Losses | (13,310) | (14,785)
Fair Value | 61,305 | 55,784
Marketable-Debt Securities |  |
Debt and Equity Securities, FV-NI |  |
Cost or Amortized Cost | 29,694 | 46,476
Unrealized Gains | 301 | 478
Unrealized Losses | (73) | (69)
Fair Value | 29,922 | 46,885
Marketable-Debt Securities | U.S. treasury securities |  |
Debt and Equity Securities, FV-NI |  |
Cost or Amortized Cost | 15,907 | 32,674
Unrealized Gains | 139 | 331
Unrealized Losses | 0 | 0
Fair Value | 16,046 | 33,005
Marketable-Debt Securities | Corporate bonds |  |
Debt and Equity Securities, FV-NI |  |
Cost or Amortized Cost | 13,787 | 13,802
Unrealized Gains | 162 | 147
Unrealized Losses | (73) | (69)
Fair Value | $ 13,876 | $ 13,880

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