Note 24 - Condensed Parent Company Statements - Condensed Statements of Cash Flows (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME	$ 7,331,879	$ 5,157,664	$ 5,594,011
Items not requiring (providing) cash:
Accretion of purchase accounting adjustments	(3,407,340)
Stock award plans	517,053	466,469	373,782
Gain on sale of mortgage loans held for sale and investment securities	(2,022,656)	(2,067,537)	(1,901,015)
Changes in:
Prepaid expenses and other assets	6,464,962	1,097,510	563,696
Net cash provided by (used in) operating activities	12,324,856	10,281,837	8,469,338
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from sales of available-for-sale securities	13,602,508	20,869,621	76,480,961
Net cash provided by investing activities	(3,816,782)	(80,800,841)	(48,033,060)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock options exercised	166,230	15,570	85,800
Cash dividends paid on common stock	(2,132,221)	(1,767,486)	(1,415,180)
Proceeds from notes payable	5,000,000
Repayments of notes payable	(3,000,000)
Net cash provided by (used in) financing activities	(11,793,362)	98,837,493	29,877,744
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME	7,331,879	5,157,664	5,594,011
Items not requiring (providing) cash:
Equity in undistributed income (distributions in excess) of subsidiaries	4,585,747	(4,238,498)	(6,619,905)
Deferred income taxes	(196,399)		8,988
Accretion of purchase accounting adjustments	(65,897)
Stock award plans	517,053	466,469	373,782
Gain on sale of mortgage loans held for sale and investment securities			(18,889)
Changes in:
Prepaid expenses and other assets	(113,711)	(73,584)	(700)
Income taxes payable/refundable	(341,404)	(420,444)	139,837
Accrued expenses	(1,360,728)	2,390	32,450
Net cash provided by (used in) operating activities	10,356,540	893,997	(490,426)
CASH FLOWS FROM INVESTING ACTIVITIES
Capital contributions to subsidiary bank	(5,000,000)
Cash paid for acquistion	(4,627,810)
Proceeds from sales of available-for-sale securities			121,101
Net cash provided by investing activities	(9,627,810)		121,101
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock options exercised	166,230	15,570	85,800
Cash dividends paid on common stock	(2,132,221)	(1,767,486)	(1,415,180)
Proceeds from notes payable	5,000,000
Repayments of notes payable	(3,000,000)
Treasury Stock purchased			(371,538)
Net cash provided by (used in) financing activities	34,009	(1,751,916)	(1,700,918)
Increase (Decrease) in cash	762,739	(857,919)	(2,070,243)
Cash, beginning of year	713,996	1,571,915	3,642,158
Cash, end of year	$ 1,476,735	$ 713,996	$ 1,571,915