Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities (USD $)	Jun. 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	$ 56,292,577	$ 41,950,790
Federal funds sold	20,490,000	39,435,000
Interest-bearing deposits at financial institutions	36,786,049	33,044,917
Investment securities:
Held to maturity	166,787,372
Held to maturity	165,670,327	138,640,105
Available for sale	515,335,097	551,758,458
Loans/leases receivable, net	1,163,870,062	1,103,441,058
Derivative Instruments	1,820,501
Derivative Instruments	1,820,501
Deposits:
Deposits	1,677,368,275	1,646,991,243
Other borrowings	151,452,927	142,448,362
Nonmaturity Deposits [Member] | Fair Value, Inputs, Level 2 [Member]
Deposits:
Deposits	1,291,304,395	1,256,209,352
Deposits, fair value	1,291,304,395	1,256,209,352
Time Deposits [Member] | Fair Value, Inputs, Level 2 [Member]
Deposits:
Deposits	386,063,880	390,781,891
Deposits, fair value	387,275,000	391,923,000
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	56,292,577	41,950,790
Cash and due from banks	56,292,577	41,950,790
Interest-bearing deposits at financial institutions	56,292,577	41,950,790
Investment securities:
Available for sale		317,698
Fair Value, Inputs, Level 2 [Member] | Interest Rate Cap [Member]
Investment securities:
Derivative Instruments	1,820,501
Derivative Instruments	1,820,501
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	20,490,000	39,435,000
Federal funds sold	20,490,000	39,435,000
Investment securities:
Available for sale		551,440,760
Loans/leases receivable, net	1,518,632,461	1,430,489,328
Loans/leases receivable, net, fair value	1,521,236,736	1,441,952,443
Derivative Instruments	1,820,501
Derivative Instruments	1,820,501
Deposits:
Short-term borrowings	204,321,854	149,292,967
Short-term borrowings	204,321,854	149,292,967
Federal Home Loan Bank advances	222,900,000	231,350,000
Federal Home Loan Bank advances	235,770,000	241,623,000
Other borrowings	151,452,927	142,448,362
Other borrowings	162,038,000	152,761,000
Junior subordinated debentures	40,356,154	40,289,830
Junior subordinated debentures	28,332,467	28,094,228
Fair Value, Inputs, Level 3 [Member]
Investment securities:
Held to maturity	166,787,372	145,451,895
Held to maturity	165,670,327	138,640,105
Loans/leases receivable, net	7,668,264	8,342,182
Loans/leases receivable, net, fair value	8,281,725	9,009,557
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	36,786,049	33,044,917
Interest-bearing deposits at financial institutions	36,786,049	33,044,917
Interest-bearing deposits at financial institutions	$ 36,786,049	$ 33,044,917