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Note 2 - Revenue (Tables)

6 Months Ended

Mar. 31, 2025

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Three Months Ended March 31, 2025												Three Months Ended March 31, 2024
		Gas utility				Non utility				Total operating revenues				Gas utility				Non utility				Total operating revenues
Natural Gas (Billed and Unbilled):
Residential		$	22,591,822			$	—			$	22,591,822			$	18,843,065			$	—			$	18,843,065
Commercial			12,210,961				—				12,210,961				10,398,801				—				10,398,801
Transportation and interruptible			1,476,042				—				1,476,042				1,358,991				—				1,358,991
Other			153,299				26,161				179,460				190,719				27,045				217,764
Total contracts with customers			36,432,124				26,161				36,458,285				30,791,576				27,045				30,818,621
Alternative revenue programs			3,812				—				3,812				1,840,755				—				1,840,755
Total operating revenues		$	36,435,936			$	26,161			$	36,462,097			$	32,632,331			$	27,045			$	32,659,376

		Six Months Ended March 31, 2025												Six Months Ended March 31, 2024
		Gas utility				Non utility				Total operating revenues				Gas utility				Non utility				Total operating revenues
Natural Gas (Billed and Unbilled):
Residential		$	38,413,706			$	—			$	38,413,706			$	32,667,707			$	—			$	32,667,707
Commercial			21,455,956				—				21,455,956				18,240,077				—				18,240,077
Transportation and interruptible			2,981,745				—				2,981,745				2,729,261				—				2,729,261
Other			399,110				52,443				451,553				485,057				54,543				539,600
Total contracts with customers			63,250,517				52,443				63,302,960				54,122,102				54,543				54,176,645
Alternative revenue programs			448,623				—				448,623				2,902,083				—				2,902,083
Total operating revenues		$	63,699,140			$	52,443			$	63,751,583			$	57,024,185			$	54,543			$	57,078,728

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

		Current Assets								Current Liabilities
		Trade accounts receivable(1)				Unbilled revenue(1)				Customer credit balances				Customer deposits
Balance at September 30, 2024		$	3,080,140			$	1,294,798			$	1,915,859			$	1,488,113
Balance at March 31, 2025			9,788,091				3,746,623				797,094				1,586,123
Increase (decrease)		$	6,707,951			$	2,451,825			$	(1,118,765	)		$	98,010

X

- Definition

Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-10

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X

- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-5

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- References

No definition available.

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