Note 2 - Investments - Mortgage Loans by Loan-to-value Ratio (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)
Carrying value	26,173,041	23,645,037
Debt-to-Value Ratio, Over 80 Percent [Member]
Commercial mortgage loans	265,283	265,283
Debt-to-Value Ratio, 70 to 80 Percent [Member]
Commercial mortgage loans	1,593,911	892,800
Debt-to-Value Ratio, 60 to 70 Percent [Member]
Commercial mortgage loans	8,721,746	8,868,648
Debt-to-Value Ratio, 50 to 60 Percent [Member]
Commercial mortgage loans	5,700,000	5,700,000
Debt-to-Value Ratio, 40 to 50 Percent [Member]
Commercial mortgage loans	5,612,039	4,312,074
Debt-to-Value Ratio, 30 to 40 Percent [Member]
Commercial mortgage loans	3,726,681	1,705,350
Debt-to-Value Ratio, 20 to 30 Percent [Member]
Commercial mortgage loans	241,000	1,500,000
Debt-to-Value Ratio, 10 to 20 Percent [Member]
Commercial mortgage loans	$ 500,000	$ 500,000