Note 2 - Investments - Mortgage Loans by Loan-to-value Ratio (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Commercial mortgage loans	$ 23,744,155	$ 25,248,434
Allowance for credit losses	(99,118)	(55,685)
Carrying value	23,645,037	25,192,749
Debt-to-Value Ratio, Over 80 Percent [Member]
Commercial mortgage loans	265,283	0
Debt-to-Value Ratio, 70 to 80 Percent [Member]
Commercial mortgage loans	892,800	892,800
Debt-to-Value Ratio, 60 to 70 Percent [Member]
Commercial mortgage loans	8,868,648	6,399,210
Debt-to-Value Ratio, 50 to 60 Percent [Member]
Commercial mortgage loans	5,700,000	10,215,293
Debt-to-Value Ratio, 40 to 50 Percent [Member]
Commercial mortgage loans	4,312,074	1,820,562
Debt-to-Value Ratio, 30 to 40 Percent [Member]
Commercial mortgage loans	1,705,350	3,231,865
Debt-to-Value Ratio, 20 to 30 Percent [Member]
Commercial mortgage loans	1,500,000	2,188,704
Debt-to-Value Ratio, 10 to 20 Percent [Member]
Commercial mortgage loans	$ 500,000	$ 500,000