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Note 14 - Fair Value Measurements - Schedule of Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($)	Mar. 31, 2022	Sep. 30, 2021
Total Assets fair value	$ 1,359,498
Natural gas purchases	1,355,281	$ 2,728,935
Total Liabilities fair value	1,355,281	3,925,018
Fair Value, Inputs, Level 1 [Member]
Total Assets fair value	0
Natural gas purchases	0	0
Total Liabilities fair value	0	0
Interest rate swaps, liabilities		0
Fair Value, Inputs, Level 2 [Member]
Total Assets fair value	1,359,498
Natural gas purchases	1,355,281	2,728,935
Total Liabilities fair value	1,355,281	3,925,018
Fair Value, Inputs, Level 3 [Member]
Total Assets fair value	0
Natural gas purchases	0	0
Total Liabilities fair value	0	0
Interest Rate Swap [Member]
Interest rate swaps	1,359,498
Interest rate swaps, liabilities		1,196,083
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member]
Interest rate swaps	0
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Interest rate swaps	1,359,498
Interest rate swaps, liabilities		1,196,083
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member]
Interest rate swaps	$ 0
Interest rate swaps, liabilities		$ 0

X

- Definition

Fair market value estimated at the corresponding first of month index prices for which the obligation, the timing difference between the payment for natural gas purchases and the actual receipt of such purchases under the current asset management contract, is expected to be settled.

+ References

No definition available.

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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-Topic 820
-SubTopic 10
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Fair value of financial and nonfinancial obligations.

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