Note 1 - Summary of Significant Accounting Policies - Accumulated Other Comprehensive Earnings (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Balance	$ 74,703,914	$ 72,743,690
Net current period other comprehensive loss	(11,761,544)	(2,600,064)
Balance	60,440,931	74,703,914
AOCI Attributable to Parent [Member]
Balance	2,920,027	5,520,091
Other comprehensive loss before reclassification	(11,770,084)	(2,411,782)
Amount reclassified from accumulated other comprehensive loss	8,540	(188,282)
Net current period other comprehensive loss	(11,761,544)	(2,600,064)
Balance	$ (8,841,517)	$ 2,920,027