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Note 5 - Other Investments - Schedule of Other Investments (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Sep. 30, 2024
Investment in unconsolidated affiliates	$ 20,876,930		$ 20,876,930		$ 21,057,222
Cash investment			50,894	$ 8,743	18,258
Equity in earnings of unconsolidated affiliate	772,082	$ 282,604	2,427,470	2,979,823
Distribution from unconsolidated affiliate			(2,658,656)	0
Change in investment in unconsolidated affiliates			(180,292)	$ 2,988,566
MVP [Member]
Investment in unconsolidated affiliates	20,717,161		20,717,161		20,948,347
Southgate [Member]
Investment in unconsolidated affiliates	$ 159,769		$ 159,769		$ 108,875

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The amount of change in investment in unconsolidated affiliate.

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Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

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