Consolidated Statements of Income - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
OPERATING REVENUES:
Revenues	$ 63,075,391	$ 68,026,525
OPERATING EXPENSES:
Operations and maintenance	16,180,229	14,089,019
General taxes	2,194,789	2,066,794
Depreciation and amortization	7,890,725	7,454,274
Total operating expenses	50,557,209	56,431,061
OPERATING INCOME	12,518,182	11,595,464
Equity in earnings of unconsolidated affiliate	4,814,874	3,020,348
Other income, net	636,296	351,882
Interest expense	4,099,158	3,618,551
INCOME BEFORE INCOME TAXES	13,870,194	11,349,143
INCOME TAX EXPENSE	3,305,660	2,650,731
NET INCOME	$ 10,564,534	$ 8,698,412
EARNINGS PER COMMON SHARE:
Basic (in usd per share)	$ 1.30	$ 1.08
Diluted (in usd per share)	$ 1.30	$ 1.08
WEIGHTED AVERAGE SHARES OUTSTANDING:
Basic (in shares)	8,125,938	8,039,484
Diluted (in shares)	8,146,666	8,078,950
Gas Utility
OPERATING REVENUES:
Revenues	$ 62,408,925	$ 67,306,260
OPERATING EXPENSES:
Cost of sales	23,949,481	32,401,123
Non Utility
OPERATING REVENUES:
Revenues	666,466	720,265
OPERATING EXPENSES:
Cost of sales	$ 341,985	$ 419,851