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Note 16 - Regulatory Assets and Liabilities - Schedule of Regulatory Liabilities (Details) - USD ($)	Mar. 31, 2022	Sep. 30, 2021
Regulatory liabilities	$ 3,195,059	$ 329,959
Asset retirement obligations	7,876,084	7,628,958
Regulatory cost of retirement obligations	14,126,243	13,640,567
Regulatory Liability, Noncurrent	12,706,518	12,891,242
Total non-current	34,708,845	34,160,767
Total regulatory liabilities	37,903,904	34,490,726
Over-recovery of Gas Cost [Member]
Regulatory liabilities	98,776	0
Revenue Subject to Refund [Member]
Regulatory liabilities	102,879	0
Deferred Income Tax Charge [Member]
Regulatory liabilities	332,361	329,959
Regulatory Liability, Noncurrent	12,706,518	12,891,242
Supplier Refund [Member]
Regulatory liabilities	$ 2,661,043	$ 0

X

- Definition

Regulatory cost of retirement obligations not otherwise included in ARO.

+ References

No definition available.

+ Details

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- Definition

The amount of regulatory liabilities and asset retirement obligations classified as noncurrent.

+ References

No definition available.

+ Details

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- Definition

Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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- Definition

The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 405
-Section 25
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394

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- Definition

The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 405
-Section 25
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394

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- Definition

The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.24)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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