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	9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)
Corporate Debt Securities [Member]
Fair value, beginning of period		$ 186,800
Principal payment	$ (5,200)	(5,200)
Investment related losses	0	0
Fair value, end of period	181,600	181,600
Fair value, beginning of period	186,800	186,800
Funds Withheld on Coinsurance Assets [Member]
Fair value, beginning of period		653,294
Principal payment	0	0
Investment related losses	(238,754)	(483,874)
Fair value, end of period	169,420	169,420
Fair value, beginning of period	$ 408,174	$ 408,174