Note 25 - Condensed Parent Company Statements - Condensed Statements of Cash Flows (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
Accretion of purchase accounting adjustments									(406,650)	(1,629,721)	(3,407,340)
Stock award plan expense									136,138	615,385	517,053
Prepaid expenses and other assets									1,121,052	(1,302,099)	6,676,684
Net cash provided by operating activities									4,622,955	8,326,806	12,324,856
Net cash used in investing activities									(72,428,870)	24,354,762	(3,816,782)
Proceeds from stock options exercised									0	90,000	166,230
Cash dividends paid									(2,615,028)	(2,313,661)	(2,132,221)
Proceeds from issuance of subordinated notes, net									19,545,555	0	0
Repayment of Hometown Bancshares subordinated debentures									0	(6,000,000)	0
Net cash provided by (used in) financing activities									123,556,914	25,868,699	(11,793,362)
Increase in cash									55,750,999	58,550,267	(3,285,288)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD				92,671,909				34,121,642	92,671,909	34,121,642	37,406,930
CASH AND CASH EQUIVALENTS, END OF PERIOD	148,422,908				92,671,909				148,422,908	92,671,909	34,121,642
Parent Company [Member]
Net income									6,832,214	9,415,090	7,331,879
(Equity in undistributed income) distributions in excess of subsidiaries									(6,109,891)	(3,454,464)	4,585,747
Deferred income taxes									(237,281)	(633,608)	(196,399)
Accretion of purchase accounting adjustments									0	(109,829)	(65,897)
Stock award plan expense									136,138	615,385	517,053
Prepaid expenses and other assets									118,386	(28,124)	(113,711)
Income taxes payable/refundable									(193,812)	157,458	(341,404)
Accrued expenses									270,503	(26,374)	(1,360,728)
Net cash provided by operating activities									816,257	5,935,534	10,356,540
Capital contributions to subsidiary bank									0	0	(5,000,000)
Cash paid for acquistion									0	0	(4,627,810)
Net cash used in investing activities									0	0	(9,627,810)
Proceeds from stock options exercised									0	90,000	166,230
Cash dividends paid									(2,615,028)	(2,313,661)	(2,132,221)
Proceeds from issuance of notes payable									1,800,000	7,450,000	5,000,000
Proceeds from issuance of subordinated notes, net									19,545,555	0	0
Repayment of notes payable									(13,000,000)	(1,250,000)	(3,000,000)
Repayment of Hometown Bancshares subordinated debentures									0	(6,000,000)	0
Treasury Stock purchased									(390,268)	(3,604,879)	0
Net cash provided by (used in) financing activities									5,340,259	(5,628,540)	34,009
Increase in cash									6,156,516	306,994	762,739
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD				$ 1,783,729				$ 1,476,735	1,783,729	1,476,735	713,996
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 7,940,245				$ 1,783,729				$ 7,940,245	$ 1,783,729	$ 1,476,735