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Investments (Details) - USD ($) $ in Thousands | Apr. 30, 2024 | Apr. 30, 2023
--- | --- | ---
Long-term investments: |  |
Equity Method Investments. | $ 19,933 | $ 18,644
Total long-term investments | $ 20,960 | $ 23,613
Investment, Type [Extensible Enumeration] | Available-for-sale securities. | Available-for-sale securities.
Equity securities and warrants |  |
Long-term investments: |  |
Total long-term investments | $ 1,027 | $ 4,969
Investment in limited partnership fund |  |
Long-term investments: |  |
Equity Method Investments. | 19,933 | 18,644
Available-for-sale securities. |  |
Long-term investments: |  |
Total long-term investments | $ 1,027 | $ 4,969

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