Note 13 - Segment Information - Assets in Each Reportable Segment (Details) - USD ($)	Mar. 31, 2025	Dec. 31, 2024
Assets	$ 151,439,302	$ 154,853,657
Operating Segments [Member] \| Asset Management [Member]
Assets	2,267,000	2,006,000
Operating Segments [Member] \| Investment Portfolio [Member]
Assets	143,145,000	146,714,000
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Assets	$ 6,027,000	$ 6,134,000

Amount of asset recognized for present right to economic benefit.

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+ Details