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Investments (Details) - USD ($) $ in Thousands | Oct. 28, 2023 | Apr. 30, 2023
--- | --- | ---
Long-term investments: |  |
Total long-term available-for-sale securities investments | $ 1,505 | $ 4,969
Equity Method Investments. | 19,106 | 18,644
Total long-term investments | 20,611 | 23,613
Equity securities and warrants |  |
Long-term investments: |  |
Total long-term investments | $ 1,505 | $ 4,969
Investment, Type [Extensible Enumeration] | us-gaap:DebtSecuritiesMember | us-gaap:DebtSecuritiesMember
Investment in limited partnership fund |  |
Long-term investments: |  |
Equity Method Investments. | $ 19,106 | $ 18,644

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