Note 2 - Investments - Schedule of Investment Gains (Losses) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Realized gains (losses) on sales of investments	$ (94,672)	$ (140,204)	$ (139,626)	$ (219,087)
Change in allowance for credit losses recognized in earnings	93,550	0	(32,150)	115,762
Unrealized net gains (losses) recognized in earnings	419,301	(45,317)	1,006,400	311,127
Change in value of embedded derivative	(362,061)	(72,031)	(265,846)	425,122
Net investment gains (losses)	$ 56,118	$ (257,552)	$ 568,778	$ 632,924