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Note 5 - Other Investments - Schedule of Other Investments (Details) - USD ($)	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2021
Investment in unconsolidated affiliates	$ 66,871,847		$ 64,867,319
Capital contributions payable	1,929,057		2,140,637
Equity in earnings of unconsolidated affiliate	72,127	$ 1,356,683
Undistributed earnings, net of income taxes, of MVP in retained earnings	8,134,589		8,081,027
Cash investment	2,143,981	2,522,286
Change in accrued capital calls	(211,580)	(1,064,730)
Change in investment in unconsolidated affiliates	2,004,528	$ 2,814,239
MVP [Member]
Investment in unconsolidated affiliates	66,461,239		64,462,194
Capital contributions payable	1,926,918		2,139,696
Southgate [Member]
Investment in unconsolidated affiliates	410,608		405,125
Capital contributions payable	$ 2,139		$ 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% or less owned persons accounted for by the equity method (equity method investees).

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