Note 20 - Condensed Parent Company Statements - Statements of Cash Flows (Details) - USD ($)		12 Months Ended
	Mar. 07, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME		$ 5,594,011	$ 5,716,767	$ 5,782,696
Items not requiring (providing) cash:
Stock award plans		373,782	285,589	242,189
Gain on sale of mortgage loans held for sale and investment securities		(1,901,015)	(1,758,087)	(1,015,766)
Changes in:
Prepaid expenses and other assets		563,696	1,005,159	1,006,688
Net cash provided by (used in) operating activities		8,469,338	7,839,094	9,499,989
Cash Flows From Investing Activities
Proceeds from sales of available-for-sale securities		76,480,961	33,059,741	41,759,062
Net cash provided by investing activities		(48,033,060)	(20,236,477)	(9,983,354)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from Issuance of Common Stock	$ 15,800,000			15,814,312
Common and preferred cash dividends paid		(1,415,180)	(873,499)	(844,786)
Net cash provided by (used in) financing activities		29,877,744	18,677,912	674,055
Cash, beginning of year		3,561,272
Cash, end of year		3,769,478	3,561,272
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME		5,594,011	5,716,767	5,782,696
Items not requiring (providing) cash:
Equity in undistributed income of subsidiaries		(6,619,905)	(6,559,132)	(6,666,682)
Deferred income taxes		8,988		(17,976)
Stock award plans		373,782	285,589	242,189
Gain on sale of mortgage loans held for sale and investment securities		(18,889)
Changes in:
Prepaid expenses and other assets		(700)	2,060	157,745
Income taxes payable/refundable		139,837	1,096,653	326,287
Accrued expenses		32,450	(95,779)	55,519
Net cash provided by (used in) operating activities		(490,426)	446,158	(120,222)
Cash Flows From Investing Activities
Proceeds from sales of available-for-sale securities		121,101
Net cash provided by investing activities		121,101
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from Issuance of Common Stock				15,814,312
Stock options exercised		85,800	187,129	210,870
Common and preferred cash dividends paid		(1,415,180)	(873,499)	(844,786)
Treasury Stock purchased		(371,538)
Redemption of preferred stock				(12,000,000)
Net cash provided by (used in) financing activities		(1,700,918)	(686,370)	3,180,396
Increase (Decrease) in cash		(2,070,243)	(240,212)	3,060,174
Cash, beginning of year		3,642,158	3,882,370	822,196
Cash, end of year		$ 1,571,915	$ 3,642,158	$ 3,882,370