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] - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
Corporate Debt Securities [Member]
Fair value, corporate bonds, beginnig of period	$ 191,600	$ 191,600
Investment related gains (losses), corporate bonds, net
Fair value, corporate bonds, end of period	191,600	191,600
Funds Withheld on Coinsurance Assets [Member]
Fair value, funds withheld, beginnig of period
Investment related gains (losses), funds withheld, net	(637,033)	(637,033)
Fair value, funds withheld, end of period	$ (637,033)	$ (637,033)