Note 24 - Condensed Parent Company Statements - Condensed Statements of 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
Interest expense	$ 3,304,666	$ 3,459,478	$ 3,449,152	$ 3,321,718	$ 2,946,828	$ 2,648,869	$ 2,406,858	$ 1,925,064	$ 13,535,014	$ 9,927,619	$ 6,086,554
Other									3,804,805	3,938,584	2,862,144
Income before income taxes	2,739,727	3,005,817	2,857,210	2,495,494	3,008,899	5,324,915	(796,558)	1,649,436	11,098,248	9,186,692	7,728,413
Provision for income taxes	424,042	455,275	428,711	375,130	624,023	1,390,673	(453,574)	293,691	1,683,158	1,854,813	2,570,749
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
Parent Company [Member]
Dividends from subsidiary bank									8,000,000	14,000,000	2,000,000
Other									40,855	31,016	19,017
									8,040,855	14,031,016	2,019,017
Interest expense									362,079	120,503	631,202
Other									2,439,799	2,773,018	1,158,462
									2,801,878	2,893,521	1,789,664
Income before income taxes									5,238,977	11,137,495	229,353
Provision for income taxes									(721,649)	(780,131)	(689,813)
Income before equity in undistributed earnings of subsidiaries									5,960,626	11,917,626	919,166
Equity in undistributed income of subsidiaries									3,454,464	(4,585,747)	4,238,498
Net income									$ 9,415,090	$ 7,331,879	$ 5,157,664