Note 24 - Condensed Parent Company Statements - Statements of Comprehensive Income (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
NET INCOME	$ 2,315,685	$ 2,550,542	$ 2,428,499	$ 2,120,364	$ 2,384,876	$ 3,934,242	$ (342,984)	$ 1,355,745	$ 9,415,090	$ 7,331,879	$ 5,157,664
Change in unrealized gain (loss) on investment securities available-for-sale, before income taxes									3,018,580	(1,130,514)	1,182,895
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax									(2,899,860)	791,465	632,990
Other comprehensive loss									21,721	(246,563)	1,103,048
Comprehensive income (loss) of Bank									9,436,811	7,085,316	6,260,712
Parent Company [Member]
NET INCOME									9,415,090	7,331,879	5,157,664
Change in unrealized gain (loss) on investment securities available-for-sale, before income taxes
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax									(560,388)
Income tax expense (benefit) related to other items of comprehensive income									(142,899)
Other comprehensive loss									(417,489)
Comprehensive income (loss) of Bank									439,210	(246,563)	1,103,048
TOTAL COMPREHENSIVE INCOME									$ 9,436,811	$ 7,085,316	$ 6,260,712