Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 10,893,830	$ 8,242,807
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,143,085	5,821,417
Cost of retirement of utility plant, net	(391,297)	(285,489)
Stock option grants		0
Equity in earnings of unconsolidated affiliate	(3,488,253)	(2,038,417)
Allowance for funds used during construction	(272,108)	0
Changes in assets and liabilities which provided (used) cash, exclusive of changes and noncash transactions shown separately	(99,850)	4,846,199
Net cash provided by operating activities	12,826,099	16,586,517
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for utility property	(16,969,559)	(16,646,978)
Investment in unconsolidated affiliates	(6,590,424)	(16,650,944)
Proceeds from disposal of utility property	53,921	1,819
Net cash used in investing activities	(23,506,062)	(33,296,103)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of unsecured notes	18,298,000	51,559,000
Retirements of notes payable	0	(24,000,000)
Borrowings under line-of-credit	14,096,520	23,308,642
Repayments under line-of-credit	(19,410,863)	(30,669,659)
Debt issuance expenses	(70,750)	(92,856)
Proceeds from issuance of stock	1,519,862	1,482,430
Cash dividends paid	(4,182,949)	(3,887,037)
Net cash provided by financing activities	10,249,820	17,700,520
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(430,143)	990,934
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	1,631,348	247,411
CASH AND CASH EQUIVALENTS AT END OF YEAR	1,201,205	1,238,345
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest	3,357,737	2,725,248
Income taxes	$ 985,000	$ 1,951,000