Note 5 - Other Investments - Schedule of Other Investments (Details) - USD ($)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Investment in unconsolidated affiliates	$ 20,723,697	$ 21,057,222
Cash investment	76,385	18,258
Equity in earnings of unconsolidated affiliate	3,234,632	3,851,871
Distributions from unconsolidated affiliate	(3,644,542)	0
Change in investment in unconsolidated affiliates	(333,525)	3,870,129
MVP [Member]
Investment in unconsolidated affiliates	20,538,437	20,948,347
Southgate [Member]
Investment in unconsolidated affiliates	$ 185,260	$ 108,875