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Note 4 - Loans and Allowance for Loan Losses (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Jun. 30, 2014
Short-Term Interest Only-Payments [Member]
Commercial and Industrial [Member]
Jun. 30, 2014
Extended at Interest Rate Lower Than Current Market Rate [Member]
Commercial Real Estate Loans [Member]
Jun. 30, 2014
Troubled Debt Restructurings Performing According to Modified Terms [Member]
Dec. 31, 2013
Troubled Debt Restructurings Performing According to Modified Terms [Member]
Jun. 30, 2014
Troubled Debt Restructurings [Member]
Dec. 31, 2013
Troubled Debt Restructurings [Member]
Jun. 30, 2014
Commercial and Industrial [Member]
Mar. 31, 2014
Unsecured [Member]
Dec. 31, 2013
Unsecured [Member]
Jun. 30, 2014
Troubled Debt Restructurings [Member]
Jun. 30, 2013
Troubled Debt Restructurings [Member]
Dec. 31, 2013
Troubled Debt Restructurings [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]                              
Allowance for Loan and Lease Losses, Period Increase (Decrease) $ (194)   $ (321)                   $ 0 $ 0  
Allowance for Loan and Lease Losses, Write-offs 0   0                        
Provision for Loan and Lease Losses Increase (Decrease)     (871)                        
Increase (Decrease) in Other Loans               3,839              
Change in Troubled Debt Restructurings 30.50%                            
Financing Receivable, Modifications, Number of Contracts       2 1         3          
Financing Receivable, Modifications, Recorded Investment 16,445   12,606 3,621 767         4,388          
Percentage of Loan Portfolio           98.00% 98.00%       5.28% 5.13%      
Impaired Financing Receivable, Related Allowance 2,337   2,625         1,317 1,511       0 0  
Loans and Leases Receivable, Impaired, Commitment to Lend                         1,975   718
Financing Receivable, Modifications, Subsequent Default, Number of Contracts 0 0                          
Minimum Loan Balance for Loans Evaluated by Risk Categories $ 500