Consolidated Balance Sheets - USD ($)	Sep. 30, 2024	Sep. 30, 2023
CURRENT ASSETS:
Cash and cash equivalents	$ 894,185	$ 1,512,431
Accounts receivable, net	4,483,739	4,194,934
Inventories	1,799,631	1,674,462
Gas in storage	8,491,490	11,185,601
Prepaid income taxes	2,362,069	3,227,544
Regulatory assets	5,103,910	2,854,276
Interest rate swaps	871,026	1,533,057
Other	1,066,251	612,957
Total current assets	25,072,301	26,795,262
UTILITY PROPERTY:
In service	345,864,008	318,369,891
Accumulated depreciation and amortization	(92,462,376)	(85,752,798)
In service, net	253,401,632	232,617,093
Construction work in progress	8,639,822	14,966,458
Utility property, net	262,041,454	247,583,551
OTHER NON-CURRENT ASSETS:
Regulatory assets	4,445,044	5,389,445
Investment in unconsolidated affiliates	21,057,222	17,187,093
Benefit plan assets	5,416,536	1,901,902
Deferred Income Tax Assets, Net	771,746	1,163,594
Interest rate swaps	1,191,526	3,084,398
Other	703,394	624,095
Total other non-current assets	33,585,468	29,350,527
TOTAL ASSETS	320,699,223	303,729,340
Liabilities, Current [Abstract]
Current maturities of long-term debt	800,000	10,975,000
Line-of-credit	11,166,181	4,353,572
Dividends payable	2,050,286	1,978,400
Accounts payable	5,429,703	5,838,643
Customer credit balances	1,915,859	1,972,132
Customer deposits	1,488,113	1,476,321
Accrued expenses	4,988,281	4,661,722
Regulatory liabilities	834,278	1,632,716
Other	25,729	30,281
Total current liabilities	28,698,430	32,918,787
LONG-TERM DEBT:
Notes payable	136,955,000	126,100,000
Unamortized debt issuance costs	(282,092)	(255,272)
Long-term debt, net	136,672,908	125,844,728
DEFERRED CREDITS AND OTHER NON-CURRENT LIABILITIES:
Asset retirement obligations	11,142,095	10,792,831
Regulatory cost of retirement obligations	14,409,847	13,029,376
Benefit plan liabilities	113,600	47,674
Deferred Income Tax Liabilities, Net	1,890,562	2,008,458
Regulatory liabilities	19,326,567	18,031,693
Other	308,439	323,168
Total deferred credits and other non-current liabilities	47,191,110	44,233,200
COMMITMENTS AND CONTINGENCIES (Note 14)
STOCKHOLDERS' EQUITY:
Common stock, $5 par value; authorized 20,000,000 shares; issued and outstanding 10,249,899 and 10,015,254 shares in 2024 and 2023, respectively	51,249,495	50,076,270
Preferred stock, no par; authorized 5,000,000 shares; no shares issued and outstanding in 2024 and 2023	0	0
Capital in excess of par value	47,988,270	44,430,786
Retained earnings	7,572,439	3,972,280
Accumulated other comprehensive income	1,326,571	2,253,289
Total stockholders’ equity	108,136,775	100,732,625
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 320,699,223	$ 303,729,340