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]	12 Months Ended
	Dec. 31, 2023 USD ($)
Corporate Debt Securities [Member]
Fair value, beginning of period	$ 181,600
Principal payment	(12,000)
Acquisition	0
Investment related gains (losses)	0
Fair value, end of period	169,600
Collateralized Mortgage-Backed Securities [Member]
Fair value, beginning of period	396,250
Principal payment	0
Acquisition	0
Investment related gains (losses)	91,250
Fair value, end of period	487,500
Term Loans [Member]
Fair value, beginning of period	18,149,718
Principal payment	(2,278,802)
Acquisition	1,233,677
Investment related gains (losses)	(52,173)
Fair value, end of period	17,052,420
Other Invested Assets [Member]
Fair value, beginning of period	1,760,777
Principal payment	(547,952)
Acquisition	898,961
Investment related gains (losses)	127,897
Fair value, end of period	$ 2,239,683