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Note 6 - Other Investments - Schedule of Other Investments (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2021
Investment in unconsolidated affiliates	$ 27,321,251		$ 27,321,251		$ 64,867,319
Capital contributions payable	773,090		773,090		2,140,637
Equity in earnings (loss) of unconsolidated affiliate	(445)	$ (3,797)	71,682	$ 1,352,886
Undistributed earnings, net of income taxes, of MVP in retained earnings	8,134,259		8,134,259		8,081,027
Cash investment			3,572,011	2,720,008
Change in accrued capital calls			(1,367,548)	(1,071,205)
Pre-tax impairment	39,822,213	$ (0)	39,822,213	(0)
Change in investment in unconsolidated affiliates			(37,546,068)	$ 3,001,689
MVP [Member]
Investment in unconsolidated affiliates	27,237,888		27,237,888		64,462,194
Capital contributions payable	772,601		772,601		2,139,696
Southgate [Member]
Investment in unconsolidated affiliates	83,363		83,363		405,125
Capital contributions payable	$ 489		$ 489		$ 941

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Capital contributions remaining to be paid pursuant to the capital call notice.

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Amount of consolidated retained earnings that represent undistributed (not yet received) earnings from 50 percent or less owned persons accounted for by the equity method (equity method investees).

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