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Note 6 - Other Investments - Schedule of Other Investments (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2023
Investment in unconsolidated affiliates | $ 18,654,928 |  | $ 17,187,093
Equity in earnings of unconsolidated affiliate | 1,467,835 | $ 1,232 |
Undistributed earnings, net of income taxes, of MVP in retained earnings, excluding impairment | 10,773,811 |  | 9,683,797
Cash investment | (0) | 818,178 |
Change in accrued capital calls | 0 | 39,466 |
Change in investment in unconsolidated affiliates | 1,467,835 | $ 858,876 |
MVP [Member] |  |  |
Investment in unconsolidated affiliates | 18,564,311 |  | 17,096,476
Southgate [Member] |  |  |
Investment in unconsolidated affiliates | $ 90,617 |  | $ 90,617

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