Note 2 - Investments - Valuation Allowance on Securities (Details) - Real Estate Loan [Member] - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Charge-offs	$ (420,013)	$ 0
Change in provision for credit losses	432,975	(0)
Specific Allowance [Member]
Beginning allowance balance	0	0
Charge-offs	(420,013)	0
Change in provision for credit losses	670,013	0
Ending Allowance	250,000	0
General Allowance [Member]
Beginning allowance balance	55,685	21,644
Charge-offs	0	0
Change in provision for credit losses	182,975	0
Ending Allowance	$ 238,660	$ 21,644