Note 6 - Loans (Details) - Loans Secured by Commercial Real Estate - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Note 6 - Loans (Details) - Loans Secured by Commercial Real Estate [Line Items]
Percentage of loans, gross	100.00%	100.00%
Commercial Real Estate Portfolio Segment [Member]
Note 6 - Loans (Details) - Loans Secured by Commercial Real Estate [Line Items]
Loans, gross (in Dollars)	$ 425,154
Percentage of loans, gross	51.60%	53.40%
Percentage of Bank's total regulatory capital	286.90%
Commercial Real Estate Portfolio Segment [Member] | Construction, Land Development and Other Land Loan [Member]
Note 6 - Loans (Details) - Loans Secured by Commercial Real Estate [Line Items]
Loans, gross (in Dollars)	$ 57,250
Percentage of loans, gross	7.00%
Percentage of Bank's total regulatory capital	38.60%
Commercial Real Estate Portfolio Segment [Member] | Multi Family Residential [Member]
Note 6 - Loans (Details) - Loans Secured by Commercial Real Estate [Line Items]
Loans, gross (in Dollars)	$ 8,473
Percentage of loans, gross	1.00%
Percentage of Bank's total regulatory capital	5.70%
Commercial Real Estate Portfolio Segment [Member] | Nonfarm Nonresidential [Member]
Note 6 - Loans (Details) - Loans Secured by Commercial Real Estate [Line Items]
Loans, gross (in Dollars)	$ 359,431
Percentage of loans, gross	43.60%
Percentage of Bank's total regulatory capital	242.60%