Note 1 - Summary of Significant Accounting Policies - Reclassifications from Accumulated Other comprehensive Earnings (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net realized investment losses (gains)	$ 59,333	$ (141,481)	$ 402,320	$ (741,123)
Income Tax Expense (Benefit), Total	(99,919)	13,150	240,980	(122,796)
Total reclassification adjustment, net of tax	(403,989)	13,916	787,342	(716,923)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Total reclassification adjustment, net of tax	(53,010)	(70,517)	(325,204)	(188,340)
Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Net realized investment losses (gains)	(67,102)	(89,262)	(411,651)	(238,405)
Income Tax Expense (Benefit), Total	$ 14,092	$ 18,745	$ 86,447	$ 50,065