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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Mar. 31, 2022
Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ (20,909,900) $ 9,490,741
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 4,656,829 4,405,956
Cost of retirement of utility plant, net (298,580) (265,021)
Stock option grants 5,550 0
Equity in earnings of unconsolidated affiliate (71,682) (1,352,886)
Impairment of unconsolidated affiliates 39,822,213 (0)
Allowance for funds used during construction 0 (55,981)
Changes in assets and liabilities which used cash, exclusive of changes and noncash transactions shown separately (10,211,524) (2,611,407)
Net cash provided by operating activities 12,992,906 9,611,402
CASH FLOWS FROM INVESTING ACTIVITIES:    
Expenditures for utility property (10,758,703) (8,978,822)
Investment in unconsolidated affiliates (3,572,011) (2,720,008)
Proceeds from disposal of utility property 51,834 7,390
Net cash used in investing activities (14,278,880) (11,691,440)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from issuance of unsecured notes 26,720,000 3,780,000
Retirement of notes payable (25,000,000) 0
Borrowings under line-of-credit 34,423,129 22,535,162
Repayments under line-of-credit (52,052,026) (22,396,839)
Debt issuance expenses (39,732) 0
Proceeds from issuance of stock (28,342,019) (1,544,448)
Cash dividends paid (3,193,743) (2,947,250)
Net cash provided by financing activities 9,199,647 2,515,521
NET INCREASE IN CASH AND CASH EQUIVALENTS 7,913,673 435,483
BEGINNING CASH AND CASH EQUIVALENTS 1,518,317 291,066
ENDING CASH AND CASH EQUIVALENTS $ 9,431,990 $ 726,549