Note 24 - Condensed Parent Company Statements - Condensed Balance Sheets (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash	$ 92,671,909	$ 34,121,642	$ 37,406,930	$ 9,088,441
Deferred and receivable income taxes	3,410,941	3,650,553
	1,012,024,625	965,137,870
Subordinated debentures	15,465,000	21,760,829
Note payable to bank	11,200,000	5,000,000
Common stock	691,950	690,200
Additional paid-in capital	51,908,867	51,382,585
Retained earnings, substantially restricted	72,860,750	65,829,687
Accumulated other comprehensive loss	(431,035)	(452,756)
Treasury stock	(40,398,650)	(36,971,124)
	1,012,024,625	965,137,870
Parent Company [Member]
Cash	1,783,729	1,476,735
Investment in subsidiary	108,504,578	104,786,630
Investment in Capital Trusts	465,000	651,000
Prepaid expenses and other assets	336,796	132,946
Deferred and receivable income taxes	1,625,872	1,006,823
	112,715,975	108,054,134
Subordinated debentures	15,465,000	21,760,829
Note payable to bank	11,200,000	5,000,000
Accrued expenses and other liabilities	1,412,193	807,813
Due to subsidiary	6,900	6,900
Common stock	691,950	690,200
Additional paid-in capital	51,908,867	51,382,585
Retained earnings, substantially restricted	72,860,750	65,829,687
Accumulated other comprehensive loss	(431,035)	(452,756)
Treasury stock	(40,398,650)	(36,971,124)
	$ 112,715,975	$ 108,054,134