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Regulatory Assets and Liabilities (Schedule of Regulatory Assets) (Details) - USD ($)
Jun. 30, 2020
Sep. 30, 2019
Regulatory Assets [Line Items]    
Current regulatory assets $ 2,298,890 $ 1,521,939
Utility property in service, other 11,945 11,945
Construction work in progress - AFUDC 272,108 0
Noncurrent regulatory assets 11,604,142 12,178,853
Total regulatory assets 14,187,085 13,712,737
WNA [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 1,883,099 569,558
ESAC Assets [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 180,809 265,392
Noncurrent regulatory assets 326,274 756,803
Accrued pension and postretirement medical [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 150,667 602,674
Noncurrent regulatory assets 9,414,695 9,414,695
Other deferred expenses [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 84,315 84,315
Noncurrent regulatory assets 236,006 294,547
Premium on early retirement of debt [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets $ 1,627,167 $ 1,712,808