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Note 4 - Loans and Allowance for Loan Losses (Details) (USD $)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Sep. 30, 2013
Dec. 31, 2012
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]          
Allowance for Loan and Lease Losses, Period Increase (Decrease) $ (39,000)     $ (272,000) $ 2,169,000
Allowance for Loan and Lease Losses, Write-offs 0     0 536,000
Allowance for Loan and Lease Losses, Adjustments, Net   503,000      
Proceeds from Recoveries of Loans Previously Charged off     275,000    
Change in Troubled Debt Restructurings       33.90%  
Financing Receivable, Modifications, Recorded Investment 11,214,000     11,214,000 16,954,000
Troubled Debt Payments Recieved       1,140,000  
Change In Troubled Debt Restructurings, Payoff Amount     300,000    
Impaired Financing Receivable, Related Allowance 1,494,000     1,494,000 1,979,000
Other Commitment 126,000     126,000 109,000
Minimum Loan Balance for Loans Evaluated by Risk Categories 500,000     500,000  
Commercial Real Estate [Member]
         
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]          
Financing Receivable, Modifications, Recorded Investment         4,222,000
Troubled Debt Restructurings Modified in Current Period [Member]
         
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]          
Allowance for Loan and Lease Losses, Period Increase (Decrease)       7,000  
Allowance for Loan and Lease Losses, Write-offs       0  
Impaired Financing Receivable, Related Allowance 7,000     7,000  
Troubled Debt Restructurings [Member]
         
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]          
Increase (Decrease) in Other Loans       (5,740,000)  
Impaired Financing Receivable, Related Allowance $ 1,560,000     $ 1,560,000 $ 2,107,000
Commercial and Industrial [Member]
         
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]          
Financing Receivable, Modifications, Number of Contracts       1  
Troubled Debt Restructurings Performing According to Modified Terms [Member]
         
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]          
Percentage of Loan Portfolio 89.00%     89.00% 93.00%
Unsecured [Member]
         
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]          
Percentage of Loan Portfolio 5.11%     5.11% 4.87%