Note 1 - Summary of Significant Accounting Policies - Accumulated Other Comprehensive Earnings (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Balance	$ 60,440,931	$ 74,703,914
Balance	59,586,450	56,649,168
AOCI Attributable to Parent [Member]
Balance	(8,841,517)	2,920,027
Other comprehensive earnings (loss) before reclassification	(2,239,651)	(12,370,634)
Amount reclassified from accumulated other comprehensive earnings (loss)	46,421	496
Net current period other comprehensive earnings (loss)	(2,193,230)	(12,370,138)
Balance	$ (11,034,747)	$ (9,450,111)