Note 4 - 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]	3 Months Ended
	Mar. 31, 2022 USD ($)
Corporate Debt Securities [Member]
Fair value, beginning of period	$ 181,600
Investment related losses	0
Fair value, end of period	181,600
Funds Withheld on Coinsurance Assets [Member]
Fair value, beginning of period	544,768
Investment related losses	(282,217)
Fair value, end of period	$ 262,551