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Note 3 - Revenue (Tables)

6 Months Ended

Mar. 31, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Three Months Ended March 31, 2022												Three Months Ended March 31, 2021
		Gas utility				Non utility				Total operating revenues				Gas utility				Non utility				Total operating revenues
Natural Gas (Billed and Unbilled):
Residential		$	18,104,512			$	—			$	18,104,512			$	17,402,552			$	—			$	17,402,552
Commercial			9,487,312				—				9,487,312				9,264,611				—				9,264,611
Industrial and Transportation			1,352,161				—				1,352,161				1,252,343				—				1,252,343
Other			138,035				30,464				168,499				95,092				32,388				127,480
Total contracts with customers			29,082,020				30,464				29,112,484				28,014,598				32,388				28,046,986
Alternative Revenue Programs			417,199				—				417,199				206,676				—				206,676
Total operating revenues		$	29,499,219			$	30,464			$	29,529,683			$	28,221,274			$	32,388			$	28,253,662

		Six Months Ended March 31, 2022												Six Months Ended March 31, 2021
		Gas utility				Non utility				Total operating revenues				Gas utility				Non utility				Total operating revenues
Natural Gas (Billed and Unbilled):
Residential		$	31,317,001			$	—			$	31,317,001			$	28,648,746			$	—			$	28,648,746
Commercial			16,873,030				—				16,873,030				15,254,631				—				15,254,631
Industrial and Transportation			2,665,252				—				2,665,252				2,476,144				—				2,476,144
Other			361,863				61,889				423,752				256,169				65,905				322,074
Total contracts with customers			51,217,146				61,889				51,279,035				46,635,690				65,905				46,701,595
Alternative Revenue Programs			1,513,728				—				1,513,728				1,069,084				—				1,069,084
Total operating revenues		$	52,730,874			$	61,889			$	52,792,763			$	47,704,774			$	65,905			$	47,770,679

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, 2021		$	3,722,916			$	1,191,227			$	1,539,680			$	1,571,342
Balance at March 31, 2022			7,872,022				3,057,298				682,959				1,583,542
Increase (decrease)		$	4,149,106			$	1,866,071			$	(856,721	)		$	12,200

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045

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- 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045

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- References

No definition available.

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Period Type:	duration