Note 1 - Summary of Significant Accounting Policies - Reclassifications from Accumulated Other Comprehensive Earnings (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net realized investment losses (gains)	$ 75,565	$ (207,585)
Income Tax Expense (Benefit)	405,520	(49,805)
Net earnings (loss)	1,578,545	(160,140)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Net earnings (loss)	32,011	(7,684)
Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Net realized investment losses (gains)	40,520	(9,727)
Income Tax Expense (Benefit)	$ (8,509)	$ 2,043