Note 1 - Summary of Significant Accounting Policies - Other Comprehensive Earnings (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Unrealized holding (losses) gains arising during the period, pre tax	$ (809,101)	$ 1,980,180
Unrealized holding (losses) gains arising during the period, tax	169,912	(415,838)
Unrealized holding (losses) gains arising during the period	(639,189)	1,564,342
Reclassification adjustment for losses included in net earnings, pre tax	(1,167)	40,520
Reclassification adjustment for losses included in net earnings, tax	244	(8,509)
Reclassification adjustment for (gains) losses included in net earnings	(923)	32,011
Total other comprehensive (loss) earnings, pre tax	(810,268)	2,020,700
Total other comprehensive (loss) earnings, tax	170,156	(424,347)
Total other comprehensive (loss) earnings	$ (640,112)	$ 1,596,353