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Note 5 - Other Investments - Schedule of Other Investments (Details) - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
Investment in unconsolidated affiliates | $ 17,187,093 | $ 13,773,075
Capital contributions payable | 0 | 804,506
Equity in earnings of unconsolidated affiliate | 2,084,990 | 73,327
Undistributed earnings, net of income taxes, of MVP in retained earnings, excluding impairment | 9,683,797 | 8,135,482
Cash investment | 2,133,534 | 5,260,863
Change in accrued capital calls | (804,506) | (1,336,131)
Impairment of unconsolidated affiliates | 0 | (55,092,303)
Change in investment in unconsolidated affiliates | 3,414,018 | (51,094,244)
MVP [Member] |  |
Investment in unconsolidated affiliates | 17,096,476 | 13,689,370
Capital contributions payable | 0 | 804,404
Southgate [Member] |  |
Investment in unconsolidated affiliates | 90,617 | 83,705
Capital contributions payable | $ 0 | $ 102

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