Note 22 - Derivative Financial Instruments (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Jun. 30, 2017
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ (2,899,860)	$ 791,465	$ 632,990
First Interest Rate Swap [Member]
Derivative, Notional Amount					$ 50,000,000
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(795,612)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	(272,323)
Second Interest Rate Swap [Member]
Derivative, Notional Amount				$ 10,300,000
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(417,489)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	(142,899)
Interest Rate Swap [Member]
Derivative, Notional Amount	50,000,000
Derivative, Collateral, Obligation to Return Cash	$ 1,900,000	$ 1,500,000