Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 9,687,252	$ 7,104,252
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,095,390	3,880,945
Cost of retirement of utility plant, net	(286,237)	(123,237)
Equity in earnings of unconsolidated affiliate	(2,282,679)	(1,261,224)
Allowance for funds used during construction	(217,147)	0
Changes in assets and liabilities which provided cash, exclusive of changes and noncash transactions shown separately	171,552	1,332,387
Net cash provided by operating activities	11,168,131	10,933,123
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for utility property	(10,435,947)	(10,975,996)
Investment in unconsolidated affiliates	(5,931,060)	(13,304,263)
Proceeds from disposal of utility property	13,666	1,219
Net cash used in investing activities	(16,353,341)	(24,279,040)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of unsecured notes	17,063,000	23,979,000
Borrowings under line-of-credit	9,784,534	23,308,642
Repayments under line-of-credit	(17,957,007)	(30,669,659)
Debt issuance expenses	(70,750)	(60,343)
Proceeds from issuance of stock	1,297,070	1,068,016
Cash dividends paid	(2,758,757)	(2,559,587)
Net cash provided by financing activities	7,358,090	15,066,069
NET INCREASE IN CASH AND CASH EQUIVALENTS	2,172,880	1,720,152
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	1,631,348	247,411
CASH AND CASH EQUIVALENTS AT END OF YEAR	3,804,228	1,967,563
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest	2,001,734	1,549,778
Income taxes	$ 985,000	$ 1,623,000