Note 1 - Summary of Significant Accounting Policies - Reclassifications from Accumulated Other Comprehensive Earnings (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Net realized investment gains	$ (672,857)	$ (874,470)
Total income tax benefit	1,265,199	(140,166)
Net earnings	4,256,895	(581,662)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Net earnings	46,420	8,540
Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Net realized investment gains	58,760	10,810
Total income tax benefit	$ (12,340)	$ (2,270)