Note 1 - Summary of Significant Accounting Policies - Accumulated Other Comprehensive Earnings (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Balance	$ 67,003,549	$ 60,440,931
Net current period other comprehensive (loss) earnings	(640,112)	1,596,353
Balance	68,685,411	63,598,529
AOCI Attributable to Parent [Member]
Balance	(6,621,336)	(8,841,517)
Other comprehensive (loss) earnings before reclassification	(639,189)	1,564,342
Amount reclassified from accumulated other comprehensive (loss) earnings	(923)	32,011
Net current period other comprehensive (loss) earnings	(640,112)	1,596,353
Balance	$ (7,261,448)	$ (7,245,164)