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Note 4 - Loans and Allowance for Credit Losses (Details) - Changes in Amounts of Loans Outstanding, Direct and Indirect (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Note 4 - Loans and Allowance for Credit Losses (Details) - Changes in Amounts of Loans Outstanding, Direct and Indirect [Line Items]    
Additions $ 7,091 $ 13,488
Repayments (8,403) (6,738)
Beginning of Period [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Changes in Amounts of Loans Outstanding, Direct and Indirect [Line Items]    
Balance 31,435 24,685
End of Period [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Changes in Amounts of Loans Outstanding, Direct and Indirect [Line Items]    
Balance $ 30,123 $ 31,435