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Regulatory Assets and Liabilities (Schedule of Regulatory Liabilities) (Details) - USD ($)
Dec. 31, 2020
Sep. 30, 2020
Regulatory Liabilities [Line Items]    
Current regulatory liabilities $ 267,503 $ 890,313
Deferred Credits and Other Liabilities:    
Asset retirement obligations 7,288,892 7,180,982
Regulatory cost of retirement obligations 12,892,254 12,678,043
Noncurrent regulatory liabilities - excess deferred income taxes 10,612,992 10,729,082
Total non-current 30,794,138 30,588,107
Total regulatory liabilities 31,061,641 31,478,420
WNA [Member]    
Regulatory Liabilities [Line Items]    
Current regulatory liabilities 0 601,784
Excess deferred income taxes [Member]    
Regulatory Liabilities [Line Items]    
Current regulatory liabilities 205,353 205,353
Other deferred liabilities [Member]    
Regulatory Liabilities [Line Items]    
Current regulatory liabilities $ 62,150 $ 83,176