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Note 5 - Other Investments - Schedule of Other Investments (Details) - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023
Investment in unconsolidated affiliates | $ 21,057,222 | $ 17,187,093
Cash investment | 18,258 | 2,133,534
Change in accrued capital calls | 0 | (804,506)
Equity in earnings of unconsolidated affiliate | 3,851,871 | 2,084,990
Change in investment in unconsolidated affiliates | 3,870,129 | 3,414,018
MVP [Member] |  |
Investment in unconsolidated affiliates | 20,948,347 | 17,096,476
Southgate [Member] |  |
Investment in unconsolidated affiliates | $ 108,875 | $ 90,617

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