Note 25 - Condensed Parent Company Statements - Condensed Balance Sheets (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Cash	$ 148,422,908	$ 92,671,909
Deferred and receivable income taxes	3,675,694	3,410,941
Assets, Total	1,146,252,939	1,012,024,625
Note payable to bank	0	11,200,000
Common stock	691,950	691,950
Additional paid-in capital	51,337,219	51,908,867
Retained earnings, substantially restricted	77,073,707	72,860,750
Accumulated other comprehensive loss	(53,378)	(431,035)
Treasury stock	(40,081,132)	(40,398,650)
Liabilities and Equity, Total	1,146,252,939	1,012,024,625
Subordinated Debentures Issued to Capital Trusts [Member]
Subordinated Debt, Ending Balance	15,465,000	15,465,000
Subordinated Notes, Net [Member]
Subordinated Debt, Ending Balance	19,564,131	0
Parent Company [Member]
Cash	7,940,245	1,783,729
Investment in subsidiary	115,472,127	108,504,578
Investment in Capital Trusts	465,000	465,000
Prepaid expenses and other assets	218,411	336,796
Deferred and receivable income taxes	2,197,483	1,625,872
Assets, Total	126,293,266	112,715,975
Note payable to bank	0	11,200,000
Accrued expenses and other liabilities	2,288,869	1,412,193
Due to subsidiary	6,900	6,900
Common stock	691,950	691,950
Additional paid-in capital	51,337,219	51,908,867
Retained earnings, substantially restricted	77,073,707	72,860,750
Accumulated other comprehensive loss	(53,378)	(431,035)
Treasury stock	(40,081,132)	(40,398,650)
Liabilities and Equity, Total	126,293,266	112,715,975
Parent Company [Member] | Subordinated Debentures Issued to Capital Trusts [Member]
Subordinated Debt, Ending Balance	15,465,000	15,465,000
Parent Company [Member] | Subordinated Notes, Net [Member]
Subordinated Debt, Ending Balance	$ 19,564,131	$ 0