Note 4 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Details) - Fair Value, Inputs, Level 3 [Member] - Fair Value, Recurring [Member] - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024
Corporate Debt Securities [Member]
Fair value, beginning of period	$ 169,600	$ 169,600
Principal payment	0	0
Acquisition	0	0
Investment related gains (losses), net	0	0
Fair value, end of period	169,600	169,600
Collateralized Mortgage-Backed Securities [Member]
Fair value, beginning of period	333,750	487,500
Principal payment	0	0
Acquisition	0	0
Investment related gains (losses), net	0	(153,750)
Fair value, end of period	333,750	333,750
Term Loans [Member]
Fair value, beginning of period	17,393,363	17,052,420
Principal payment	(1,115,386)	(3,793,088)
Acquisition	97,865	2,975,890
Investment related gains (losses), net	206,910	347,530
Fair value, end of period	16,582,752	16,582,752
Other Invested Assets [Member]
Fair value, beginning of period	2,628,726	2,239,683
Principal payment	(33,626)	(39,431)
Acquisition	84,329	165,197
Investment related gains (losses), net	124,402	438,382
Fair value, end of period	$ 2,803,831	$ 2,803,831