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Note 5 - Other Investments (Tables) | 12 Months Ended
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Sep. 30, 2025
Notes Tables |
Investment [Table Text Block] |
|  | September 30 |
Balance Sheet location: |  | 2025 |  |  | 2024 |
Other Assets: |  |  |  |  |  |  |  |
MVP |  | $ | 20,538,437 |  |  | $ | 20,948,347 |
Southgate |  |  | 185,260 |  |  |  | 108,875 |
Investment in unconsolidated affiliates |  | $ | 20,723,697 |  |  | $ | 21,057,222 |
|  | September 30 |
|  | 2025 |  |  | 2024 |
Cash investment |  | $ | 76,385 |  |  | $ | 18,258 |
Equity in earnings of unconsolidated affiliate |  |  | 3,234,632 |  |  |  | 3,851,871 |
Distributions from unconsolidated affiliate |  |  | (3,644,542 | ) |  |  | — |
Change in investment in unconsolidated affiliates |  | $ | (333,525 | ) |  | $ | 3,870,129 |
Equity Method Investments [Table Text Block] |
|  | Income Statements |
|  | Years Ended September 30 |
|  | 2025 |  |  | 2024 |
Revenue |  | $ | 563,535,710 |  |  | $ | 143,052,597 |
Operating expenses |  |  | (290,825,244 | ) |  |  | (78,822,028 | )
AFUDC |  |  | 6,133,873 |  |  |  | 343,922,690 |
Other income, net |  |  | 119,761 |  |  |  | 9,900,128 |
Net income |  | $ | 278,964,100 |  |  | $ | 418,053,387 |
|  | Balance Sheets |
|  | September 30 |
|  | 2025 |  |  | 2024 |
Assets: |  |  |  |  |  |  |  |
Current assets |  | $ | 173,283,635 |  |  | $ | 263,966,727 |
Construction work in progress |  |  | — |  |  |  | 1,568,267 |
Property, plant and equipment, net |  |  | 9,418,928,665 |  |  |  | 9,522,815,742 |
Other assets |  |  | 1,789,092 |  |  |  | 13,732,299 |
Total assets |  | $ | 9,594,001,392 |  |  | $ | 9,802,083,035 |
Liabilities and Equity: |  |  |  |  |  |  |  |
Current liabilities |  | $ | 40,148,017 |  |  | $ | 168,645,751 |
Noncurrent liabilities |  |  | 1,084,072 |  |  |  | 68,965 |
Capital |  |  | 9,552,769,303 |  |  |  | 9,633,368,319 |
Total liabilities and equity |  | $ | 9,594,001,392 |  |  | $ | 9,802,083,035 |

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