Note 19 - Condensed Parent Company Statements - Condensed Statements of Income (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other									$ 2,862,144	$ 2,821,923	$ 2,672,541
Income before income taxes	$ 1,521,350	$ 2,161,034	$ 2,113,343	$ 1,932,686	$ 2,034,328	$ 2,095,916	$ 1,672,551	$ 1,803,980	7,728,413	7,606,775	8,178,096
Provision for income taxes	$ 1,102,883	$ 443,651	$ 520,770	$ 503,445	$ 514,981	$ 554,009	$ 416,399	$ 527,375	2,570,749	2,012,764	2,461,329
Net Income (Loss) Attributable to Parent									5,157,664	5,594,011	5,716,767
Parent Company [Member]
Dividends from subsidiary bank									2,000,000
Other									19,017	50,332	16,200
									2,019,017	50,332	16,200
Related party									631,202	579,410	538,785
Other									1,158,462	931,816	734,780
									1,789,664	1,511,226	1,273,565
Income before income taxes									229,353	(1,460,894)	(1,257,365)
Provision for income taxes									(689,813)	(435,000)	(415,000)
Income (loss) before equity in undistributed earnings of subsidiaries									919,166	(1,025,894)	(842,365)
Equity in undistributed income of subsidiaries									4,238,498	6,619,905	6,559,132
Net Income (Loss) Attributable to Parent									$ 5,157,664	$ 5,594,011	$ 5,716,767