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Note 3 - Related Party Transactions - Non-voting Revenues Interest and Non-voting Profits Interests (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2023
Non-voting revenues interest in EAM $ 16,183 $ 11,900 $ 10,397
Non-voting profits interest in EAM 2,135 1,382 734
Revenues and Profits Distribution from Unconsolidated Entity $ 18,318 $ 13,282 $ 11,131