Note 14 - Subsequent Events (Details Textual)	Jul. 22, 2026 USD ($) shares	Aug. 06, 2026	Jul. 31, 2026 USD ($)	Jun. 30, 2026 USD ($)	Jun. 21, 2024 USD ($)
Debt Service Coverage Ratio				1.99
Debt Instrument, Covenant, Minimum Debt Service Coverage Ratio				2
CoBank [Member]
Debt Instrument, Face Amount					$ 180,000,000
Debt Instrument, Covenants, Percentage of Debt Under IRSAs				35.00%
IRSAs With Co-Bank [Member] \| Interest Rate Swap [Member]
Debt Instrument, Face Amount				$ 43,750,000
Subsequent Event [Member]
Debt Instrument, Covenant, Minimum Debt Service Coverage Ratio		1.75
Subsequent Event [Member] \| Aureon Preferred Class B [Member]
Investment Owned, Number Of Shares Sold \| shares	238
Investment Owned, Value Of Shares Sold	$ 788,756
Subsequent Event [Member] \| Aureon Preferred Class A [Member]
Investment Owned, Number Of Shares Sold \| shares	61
Investment Owned, Value Of Shares Sold	$ 492,653
Subsequent Event [Member] \| CoBank [Member]
Debt Instrument, Covenants, Percentage of Debt Under IRSAs			35.00%
Subsequent Event [Member] \| IRSAs With Co-Bank [Member] \| Interest Rate Swap [Member]
Debt Instrument, Face Amount			$ 43,750,000