Note 4 - Investments - Sales and Maturities of Investments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Total proceeds on sales of available-for-sale securities	$ 0	$ 1,684,014
Proceeds from redemptions of fixed maturity investments	0	21,650,652
Proceeds from maturities of fixed maturity investments	0	2,336,000
Gross gains on sales	0	499,859
Gross losses on sales	0	(72,926)
Net realized and unrealized gain (loss) on investments	$ 0	$ 426,933