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Note 13 - Regulatory Assets and Liabilities - Schedule of Regulatory Liabilities (Details) - USD ($) | Dec. 31, 2024 | Sep. 30, 2024
--- | --- | ---
Regulatory liabilities | $ 1,671,639 | $ 834,278
Regulatory cost of retirement obligations | 14,823,044 | 14,409,847
Regulatory Liability, Noncurrent | 19,178,626 | 19,326,567
Total non-current | 34,001,670 | 33,736,414
Total regulatory liabilities | 35,673,309 | 34,570,692
Rate Refund [Member] |  |
Regulatory liabilities | 35,877 | 37,500
Deferred Income Tax Charge [Member] |  |
Regulatory liabilities | 591,764 | 591,764
Regulatory Liability, Noncurrent | 15,320,155 | 15,468,096
Supplier Refund [Member] |  |
Regulatory liabilities | 913,156 | 30,556
Other Deferred Liabilities [Member] |  |
Regulatory liabilities | 130,842 | 174,458
Other Regulatory Assets (Liabilities) [Member] |  |
Regulatory Liability, Noncurrent | $ 3,858,471 | $ 3,858,471

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- Definition The amount of regulatory liabilities and asset retirement obligations classified as noncurrent. + References No definition available. + Details
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- Definition The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 405 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477571/980-405-25-1 + Details
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- Definition The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 405 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477571/980-405-25-1 + Details
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- Definition The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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