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Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing $ 170 $ 359
Nonaccrual 4,521 3,626
Residential Real Estate Loans [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 129 341
Nonaccrual 3,130 2,533
Commercial Real Estate Owner Occupied [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 0 0
Nonaccrual 1,307 675
Commercial Real Estate Nonowner Occupied [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 0 0
Nonaccrual 52 352
Commercial and Industrial [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 0  
Nonaccrual 22  
Automobile Loans [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 2 11
Nonaccrual 10 4
Home Equity Loans [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 38 0
Nonaccrual 0 62
Other Consumer Loans [Member]
    
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment of Nonaccrual Loans and Loans Past Due 90 days [Line Items]    
Loans past due 90 days and still accruing 1 7
Nonaccrual $ 0 $ 0