Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities (USD $)	Sep. 30, 2014	Dec. 31, 2013
Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities [Line Items]
Cash and due from banks	$ 42,326,177	$ 41,950,790
Federal funds sold	29,760,000	39,435,000
Interest-bearing deposits at financial institutions	34,631,773	33,044,917
Investment securities:
Held to maturity	185,840,139
Held to maturity	185,936,051	138,640,105
Available for sale	466,944,567	551,758,458
Loans/leases receivable, net	1,177,475,092	1,103,441,058
Derivative instruments	1,848,119
Derivative instruments	1,848,119
Deposits:
Deposits	1,713,867,393	1,646,991,243
Other borrowings	151,455,209	142,448,362
Nonmaturity Deposits [Member] | Fair Value, Inputs, Level 2 [Member]
Deposits:
Deposits	1,298,921,913	1,256,209,352
Deposits, fair value	1,298,921,913	1,256,209,352
Time Deposits [Member] | Fair Value, Inputs, Level 2 [Member]
Deposits:
Deposits	414,945,479	390,781,891
Deposits, fair value	416,050,000	391,923,000
Interest-bearing Deposits [Member] | Fair Value, Inputs, Level 2 [Member]
Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities [Line Items]
Cash and due from banks	34,631,773	33,044,917
Interest-bearing deposits at financial institutions	34,631,773	33,044,917
Interest-bearing deposits at financial institutions	34,631,773	33,044,917
Fair Value, Inputs, Level 1 [Member]
Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities [Line Items]
Cash and due from banks	42,326,177	41,950,790
Cash and due from banks	42,326,177	41,950,790
Interest-bearing deposits at financial institutions	42,326,177	41,950,790
Investment securities:
Available for sale		317,698
Fair Value, Inputs, Level 2 [Member] | Interest Rate Cap [Member]
Investment securities:
Derivative instruments	1,848,119
Derivative instruments	1,848,119
Fair Value, Inputs, Level 2 [Member]
Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities [Line Items]
Federal funds sold	29,760,000	39,435,000
Federal funds sold	29,760,000	39,435,000
Investment securities:
Available for sale		551,440,760
Loans/leases receivable, net	1,537,493,236	1,430,489,328
Loans/leases receivable, net, fair value	1,544,453,008	1,441,952,443
Derivative instruments	1,848,119
Derivative instruments	1,848,119
Deposits:
Short-term borrowings	162,186,698	149,292,967
Short-term borrowings	162,186,698	149,292,967
Federal Home Loan Bank advances	196,500,000	231,350,000
Federal Home Loan Bank advances	202,507,000	241,623,000
Other borrowings	151,455,209	142,448,362
Other borrowings	160,531,000	152,761,000
Junior subordinated debentures	40,389,809	40,289,830
Junior subordinated debentures	28,457,573	28,094,228
Fair Value, Inputs, Level 3 [Member]
Investment securities:
Held to maturity	185,840,139	145,451,895
Held to maturity	185,936,051	138,640,105
Loans/leases receivable, net	12,607,992	8,342,182
Loans/leases receivable, net, fair value	$ 13,616,631	$ 9,009,557