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INVESTMENTS AND FAIR VALUE MEASUREMENTS - Current Investments (Details) - USD ($) $ in Thousands | Jul. 31, 2025 | Apr. 30, 2025
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INVESTMENTS AND FAIR VALUE MEASUREMENTS |  |
Marketable equity securities | $ 61,305 | $ 55,784
U.S. treasury securities | 16,046 | 33,005
Total Investments - current | $ 77,351 | $ 88,789

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