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Note 2 - Investment Securities (Details) (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Note 2 - Investment Securities (Details) [Line Items]      
Number of Securities 539    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 323    
Aggregate Depreciation From Amortized Cost Basis, Percent 4.00%    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year 38    
Equity Securities [Member]
     
Note 2 - Investment Securities (Details) [Line Items]      
Percentage of Investment Portfolio 1.00%   1.00%
Other than Temporary Impairment Losses, Investments (in Dollars)   $ 0  
Debt Securities [Member]
     
Note 2 - Investment Securities (Details) [Line Items]      
Other than Temporary Impairment Losses, Investments (in Dollars) $ 0 $ 0