Note 25 - Condensed Parent Company Statements - Condensed Statements of 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 gain (loss) on foreclosed assets									$ 36,057	$ (235,394)	$ (360,892)
Interest expense	$ 2,151,524	$ 2,236,743	$ 2,136,409	$ 3,086,525	$ 3,304,666	$ 3,459,478	$ 3,449,152	$ 3,321,718	9,611,201	13,535,014	9,927,619
Other									4,045,811	3,804,805	3,938,584
Income before income taxes	905,926	2,316,595	2,332,036	2,512,835	2,739,727	3,005,817	2,857,210	2,495,494	8,067,392	11,098,248	9,186,692
Provision for income taxes	(40,284)	418,819	448,653	407,990	424,042	455,275	428,711	375,130	1,235,178	1,683,158	1,854,813
Net income available to common shareholders	$ 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
Parent Company [Member]
Dividends from subsidiary bank									2,500,000	8,000,000	14,000,000
Net gain (loss) on foreclosed assets									74,716	0	0
Other									22,515	40,855	31,016
Revenues, Total									2,597,231	8,040,855	14,031,016
Interest expense									716,070	362,079	120,503
Other									1,839,930	2,439,799	2,773,018
Costs and Expenses, Total									2,556,000	2,801,878	2,893,521
Income before income taxes									41,231	5,238,977	11,137,495
Provision for income taxes									(681,092)	(721,649)	(780,131)
Income before equity in undistributed earnings of subsidiaries									722,323	5,960,626	11,917,626
Equity in undistributed income of subsidiaries									6,109,891	3,454,464	(4,585,747)
Net income available to common shareholders									$ 6,832,214	$ 9,415,090	$ 7,331,879