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Note 13 - Regulatory Assets and Liabilities - Schedule of Regulatory Assets (Details) - USD ($)	Jun. 30, 2024	Sep. 30, 2023
Regulatory assets	$ 3,523,818	$ 2,854,276
Noncurrent regulatory assets	5,271,682	5,389,445
Total regulatory assets	8,795,500	8,243,721
WNA [Member]
Regulatory assets	1,918,161	414,689
Regulatory Clause Revenues, under-Recovered [Member]
Regulatory assets	316,729	1,383,340
Under-recovery of RNG Revenues [Member]
Regulatory assets	1,215,411	797,804
Pension Costs [Member]
Regulatory assets	60,755	243,017
Noncurrent regulatory assets	3,786,265	3,786,265
Other Assets [Member]
Regulatory assets	12,762	15,426
Noncurrent regulatory assets	314,999	347,121
Deferred Gain (Loss) on Early Extinguishment of Debt [Member]
Noncurrent regulatory assets	1,170,418	1,256,059
Total regulatory assets	$ 1,170,418	$ 1,256,059

X

- Definition

The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

+ References

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-SubTopic 340
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-Section 50
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Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost.

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