Note 2 - Investments - Summary of Mortgage Loans by Aging Category (Details) - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Commercial mortgage loans	$ 26,360,660	$ 23,744,155
Allowance for credit losses	(187,619)	(99,118)
Mortgage Loans on Real Estate	26,173,041	$ 23,645,037
Financial Asset, Not Past Due [Member]
Commercial mortgage loans	25,590,046
Allowance for credit losses	(184,560)
Mortgage Loans on Real Estate	25,405,486
Financial Asset, 1 to 30 Days Past Due [Member]
Commercial mortgage loans	0
Allowance for credit losses	0
Mortgage Loans on Real Estate	0
Financial Asset, 31 to 60 Days Past Due [Member]
Commercial mortgage loans	0
Allowance for credit losses	0
Mortgage Loans on Real Estate	0
Financial Asset, 61 to 90 Days Past Due [Member]
Commercial mortgage loans	0
Allowance for credit losses	0
Mortgage Loans on Real Estate	0
Financial Asset, Greater than 90 Days Past Due [Member]
Commercial mortgage loans	770,614
Allowance for credit losses	(3,059)
Mortgage Loans on Real Estate	$ 767,555