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Investments (Details) - USD ($)
$ in Thousands
Oct. 26, 2024
Apr. 30, 2024
Long-term investments:    
Total long-term available-for-sale securities investments $ 760 $ 1,027
Equity Method Investments. 22,182 19,933
Total long-term investments 22,942 20,960
Equity securities and warrants    
Long-term investments:    
Total long-term investments $ 760 $ 1,027
Investment, Type [Extensible Enumeration] us-gaap:DebtSecuritiesMember us-gaap:DebtSecuritiesMember
Investment in limited partnership fund    
Long-term investments:    
Equity Method Investments. $ 22,182 $ 19,933