Note 25 - Condensed Parent Company Statements - Statements of Comprehensive Income (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
NET INCOME	$ 946,210	$ 1,897,776	$ 1,883,383	$ 2,104,845	$ 2,315,685	$ 2,550,542	$ 2,428,499	$ 2,120,364	$ 6,832,214	$ 9,415,090	$ 7,331,879
Change in unrealized loss on interest rate swaps, before income taxes									(3,312,874)	(2,899,860)	791,465
Other comprehensive loss									377,657	21,721	(246,563)
Comprehensive income (loss) of Bank									7,209,871	9,436,811	7,085,316
Parent Company [Member]
NET INCOME									6,832,214	9,415,090	7,331,879
Change in unrealized loss on interest rate swaps, before income taxes									(620,521)	(560,388)	0
Income tax benefit related to other items of comprehensive income									(140,519)	(142,899)	0
Other comprehensive loss									(480,002)	(417,489)	0
Comprehensive income (loss) of Bank									857,659	439,210	(246,563)
TOTAL COMPREHENSIVE INCOME									$ 7,209,871	$ 9,436,811	$ 7,085,316