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Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Classes of the Loan Portfolio Summarized by Credit Quality (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable $ 443,729 $ 435,725
Commercial and Industrial [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 54,370 52,078
Commercial and Industrial [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 757 772
Commercial and Industrial [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 1,685 1,605
Commercial and Industrial [Member] | Doubtful [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 43 43
Commercial and Industrial [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 56,855 54,498
Real Estate Construction [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 24,606 24,052
Real Estate Construction [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 0 907
Real Estate Construction [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 635 642
Real Estate Construction [Member] | Doubtful [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 0 0
Real Estate Construction [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 25,241 25,601
Residential Real Estate Mortgage [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 204,091 198,479
Residential Real Estate Mortgage [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 926 774
Residential Real Estate Mortgage [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 10,792 11,057
Residential Real Estate Mortgage [Member] | Doubtful [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 0 0
Residential Real Estate Mortgage [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 215,809 210,310
Commercial Real Estate Mortgage [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 134,433 132,931
Commercial Real Estate Mortgage [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 2,060 2,232
Commercial Real Estate Mortgage [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 4,050 6,008
Commercial Real Estate Mortgage [Member] | Doubtful [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 0 0
Commercial Real Estate Mortgage [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 140,543 141,171
Consumer Installment [Member] | Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 5,274 4,129
Consumer Installment [Member] | Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 0  
Consumer Installment [Member] | Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 7 16
Consumer Installment [Member] | Doubtful [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 0 0
Consumer Installment [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 5,281 4,145
Pass [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 422,774 411,669
Special Mention [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 3,743 4,685
Substandard [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable 17,169 19,328
Doubtful [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable $ 43 $ 43