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Note 5 - Other Investments - Schedule of Other Investments (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2021
Investment in unconsolidated affiliates | $ 66,871,847 |  | $ 64,867,319
Capital contributions payable | 1,929,057 |  | 2,140,637
Equity in earnings of unconsolidated affiliate | 72,127 | $ 1,356,683 |
Undistributed earnings, net of income taxes, of MVP in retained earnings | 8,134,589 |  | 8,081,027
Cash investment | 2,143,981 | 2,522,286 |
Change in accrued capital calls | (211,580) | (1,064,730) |
Change in investment in unconsolidated affiliates | 2,004,528 | $ 2,814,239 |
MVP [Member] |  |  |
Investment in unconsolidated affiliates | 66,461,239 |  | 64,462,194
Capital contributions payable | 1,926,918 |  | 2,139,696
Southgate [Member] |  |  |
Investment in unconsolidated affiliates | 410,608 |  | 405,125
Capital contributions payable | $ 2,139 |  | $ 941

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