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Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]          
Interest and Fee Income, Loans and Leases (in Dollars) $ 7,676 $ 7,729 $ 22,886 $ 23,406  
Threshold Period for Considering Loans As Special Mention Or Classified     75 days    
Financing Receivable, Reclassification to Held-for-sale (in Dollars)     $ 0    
Transfer of Loans Held-for-sale to Portfolio Loans (in Dollars)     0    
Financing Receivable, Modifications, Recorded Investment (in Dollars) $ 11,861 $ 8,307 11,861 $ 8,307 $ 11,328
Financing Receivable, Modifications, Number of Contracts 0 0   2  
Allowance for Credit Losses, Change in Method of Calculating Impairment (in Dollars) $ 0   $ 0    
Financing Receivable, Modifications, Subsequent Default, Number of Contracts 0 0 0 0  
Special Mention [Member]          
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]          
Increase in Percentage of Allocation Loans Rated Special Mention     50.00%    
Classified Excluding Impaired [Member]          
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]          
Increase in Percentage of Allocation Loans Rated Classified     100.00%    
Nonperforming Financial Instruments [Member]          
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]          
Interest and Fee Income, Loans and Leases (in Dollars)     $ 0 $ 0 $ 0
Commercial Real Estate Portfolio Segment [Member]          
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]          
Financing Receivable, Modifications, Number of Contracts     1 2  
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]          
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]          
Financing Receivable, Modifications, Number of Contracts     1 1  
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]          
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]          
Financing Receivable, Modifications, Number of Contracts       1  
Allowance for Credit Losses, Change in Method of Calculating Impairment (in Dollars)   $ 249   $ 249