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Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Residential Real Estate Loans [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis $ 0  
Residential Real Estate Loans [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis 0  
Residential Real Estate Loans [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis 234  
Residential Real Estate Loans [Member] | Impaired Loans [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis 234  
Commercial and Industrial [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis 0  
Commercial and Industrial [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis 0  
Commercial and Industrial [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis 1,888  
Commercial and Industrial [Member] | Impaired Loans [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis 1,888  
Commercial and Industrial [Member] | Other Real Estate Owned [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis 0 0
Commercial and Industrial [Member] | Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis 0 0
Commercial and Industrial [Member] | Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis 982 1,055
Commercial and Industrial [Member] | Other Real Estate Owned [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis 982  
Commercial and Industrial [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis   1,055
Commercial Real Estate Construction Financing Receivable [Member] | Other Real Estate Owned [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis   0
Commercial Real Estate Construction Financing Receivable [Member] | Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis   0
Commercial Real Estate Construction Financing Receivable [Member] | Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis   1,562
Commercial Real Estate Construction Financing Receivable [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a nonrecurring basis   1,562
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a recurring basis 0 0
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a recurring basis 8,855 1,012
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a recurring basis 0 0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a recurring basis 0 0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a recurring basis 79,995 93,953
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 3 [Member]
    
Note 2 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis [Line Items]    
Assets measured on a recurring basis $ 0 $ 0