Note 20 - Condensed Parent Company Statements - Balance Sheets (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Cash	$ 9,088,441	$ 18,774,419	$ 12,493,890	$ 12,303,200
Available-for-sale securities	92,399,235	97,292,487
Deferred income taxes	3,474,135	3,230,105
	687,979,819	652,835,072
LIABILITIES
Subordinated debentures	15,465,000	15,465,000
STOCKHOLDERS' EQUITY
Common stock, $0.10 par value; authorized 10,000,000 shares; issued December 31, 2016 and 2015 - 6,875,503 and 6,859,003 shares, respectively	687,550	685,900
Additional paid-in capital	50,552,077	50,441,464
Retained earnings, substantially restricted	57,347,282	53,258,126
Unrealized loss on available-for-sale securities, net of income taxes; December 31, 2016 and 2015 - ($768,879) and ($401,688), respectively	(1,309,241)	(683,956)
Treasury stock	37,303,288	37,279,069
	687,979,819	652,835,072
Parent Company [Member]
ASSETS
Cash	1,571,915	3,642,158
Available-for-sale securities		99,517
Investment in subsidiary	83,946,411	77,953,486
Investment in Capital Trust I & II	465,000	465,000
Prepaid expenses and other assets	14,597	13,894
Refundable income taxes		119,379
Deferred income taxes		9,985
	85,997,923	82,303,419
LIABILITIES
Subordinated debentures	15,465,000	15,465,000
Accrued expenses and other liabilities	551,643	409,054
Due to subsidiary	6,900	6,900
STOCKHOLDERS' EQUITY
Common stock, $0.10 par value; authorized 10,000,000 shares; issued December 31, 2016 and 2015 - 6,875,503 and 6,859,003 shares, respectively	687,550	685,900
Additional paid-in capital	50,552,077	50,441,464
Retained earnings, substantially restricted	57,347,282	53,258,126
Unrealized loss on available-for-sale securities, net of income taxes; December 31, 2016 and 2015 - ($768,879) and ($401,688), respectively	(1,309,241)	(683,956)
Treasury stock	(37,303,288)	(37,279,069)
	$ 85,997,923	$ 82,303,419