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Note 5 - Other Investments (Tables) | 3 Months Ended
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Dec. 31, 2021
Notes Tables |
Investment [Table Text Block] |
Balance Sheet location: |  | December 31, 2021 |  |  | September 30, 2021 |
Other Assets: |  |  |  |  |  |  |  |
MVP |  | $ | 66,461,239 |  |  | $ | 64,462,194 |
Southgate |  |  | 410,608 |  |  |  | 405,125 |
Investment in unconsolidated affiliates |  | $ | 66,871,847 |  |  | $ | 64,867,319 |
Current Liabilities: |  |  |  |  |  |  |  |
MVP |  | $ | 1,926,918 |  |  | $ | 2,139,696 |
Southgate |  |  | 2,139 |  |  |  | 941 |
Capital contributions payable |  | $ | 1,929,057 |  |  | $ | 2,140,637 |
|  | Three Months Ended |
Income Statement location: |  | December 31, 2021 |  |  | December 31, 2020 |
Equity in earnings of unconsolidated affiliate |  | $ | 72,127 |  |  | $ | 1,356,683 |
|  | December 31, 2021 |  |  | September 30, 2021 |
Undistributed earnings, net of income taxes, of MVP in retained earnings |  | $ | 8,134,589 |  |  | $ | 8,081,027 |
|  | Three Months Ended |
|  | December 31, 2021 |  |  | December 31, 2020 |
Cash investment |  | $ | 2,143,981 |  |  | $ | 2,522,286 |
Change in accrued capital calls |  |  | (211,580 | ) |  |  | (1,064,730 | )
Equity in earnings of unconsolidated affiliate |  |  | 72,127 |  |  |  | 1,356,683 |
Change in investment in unconsolidated affiliates |  | $ | 2,004,528 |  |  | $ | 2,814,239 |
Equity Method Investments [Table Text Block] |
|  | Income Statements |
|  | Three Months Ended |
|  | December 31, 2021 |  |  | December 31, 2020 |
AFUDC |  | $ | 6,883,069 |  |  | $ | 133,757,314 |
Other expense, net |  |  | (45,063 | ) |  |  | (52,608 | )
Net income |  | $ | 6,838,006 |  |  | $ | 133,704,706 |
|  | Balance Sheets |
|  | December 31, 2021 |  |  | September 30, 2021 |
Assets: |  |  |  |  |  |  |  |
Current assets |  | $ | 192,288,454 |  |  | $ | 208,961,113 |
Construction work in progress |  |  | 6,429,791,662 |  |  |  | 6,281,991,035 |
Other assets |  |  | 2,496,119 |  |  |  | 980,410 |
Total assets |  | $ | 6,624,576,235 |  |  | $ | 6,491,932,558 |
Liabilities and Equity: |  |  |  |  |  |  |  |
Current liabilities |  | $ | 160,282,681 |  |  | $ | 200,441,027 |
Noncurrent liabilities |  |  | 48,000 |  |  |  | 13,000 |
Capital |  |  | 6,464,245,554 |  |  |  | 6,291,478,531 |
Total liabilities and equity |  | $ | 6,624,576,235 |  |  | $ | 6,491,932,558 |

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