Note 5 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Details) - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 3 [Member]	12 Months Ended
	Dec. 31, 2021 USD ($)
Corporate Debt Securities [Member]
Fair value, beginning of period	$ 186,800
Principal payment	(5,200)
Investment related losses	0
Fair value, end of period	181,600
Funds Withheld on Coinsurance Assets [Member]
Fair value, beginning of period	653,294
Principal payment	0
Investment related losses	(108,526)
Fair value, end of period	$ 544,768