Note 2 - Investments - Schedule of Investment Gains (Losses) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Recognized gains (losses) on sale of investments	$ (56,133)	$ (35,898)
Change in allowance for credit losses recognized in earnings	(432,975)	0
Unrealized net gains (losses) recognized in earnings	(21,790)	96,321
Change in value of embedded derivative	(118,762)	79,929
Net investment gains (losses)	(1,049,673)	140,352
Real Estate Loan [Member]
Charge-offs	$ (420,013)	$ 0