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Note 7 - Loans And Related Allowance For Loan Losses (Detail) - Classes of the Loan Portfolio Summarized by Credit Quality (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Financing Receivable $ 407,054 $ 408,433
Pass [Member] | Commercial and Industrial [Member]
   
Financing Receivable 51,789 59,390
Pass [Member] | Real Estate Construction [Member]
   
Financing Receivable 18,105 17,601
Pass [Member] | Residential Real Estate Mortgage [Member]
   
Financing Receivable 185,856 190,967
Pass [Member] | Commercial Real Estate Mortgage [Member]
   
Financing Receivable 117,462 106,509
Pass [Member] | Consumer Installment [Member]
   
Financing Receivable 3,953 4,084
Pass [Member]
   
Financing Receivable 377,165 378,551
Special Mention [Member] | Commercial and Industrial [Member]
   
Financing Receivable 929 678
Special Mention [Member] | Real Estate Construction [Member]
   
Financing Receivable 923 0
Special Mention [Member] | Residential Real Estate Mortgage [Member]
   
Financing Receivable 967 758
Special Mention [Member] | Commercial Real Estate Mortgage [Member]
   
Financing Receivable 3,149 1,928
Special Mention [Member] | Consumer Installment [Member]
   
Financing Receivable   0
Special Mention [Member]
   
Financing Receivable 5,967 3,364
Substandard [Member] | Commercial and Industrial [Member]
   
Financing Receivable 2,640 2,061
Substandard [Member] | Real Estate Construction [Member]
   
Financing Receivable 3,790 4,921
Substandard [Member] | Residential Real Estate Mortgage [Member]
   
Financing Receivable 12,240 12,147
Substandard [Member] | Commercial Real Estate Mortgage [Member]
   
Financing Receivable 5,189 7,297
Substandard [Member] | Consumer Installment [Member]
   
Financing Receivable 21 33
Substandard [Member]
   
Financing Receivable 23,880 26,459
Doubtful [Member] | Commercial and Industrial [Member]
   
Financing Receivable 43 59
Doubtful [Member] | Real Estate Construction [Member]
   
Financing Receivable 0 0
Doubtful [Member] | Residential Real Estate Mortgage [Member]
   
Financing Receivable 0 0
Doubtful [Member] | Commercial Real Estate Mortgage [Member]
   
Financing Receivable 0 0
Doubtful [Member] | Consumer Installment [Member]
   
Financing Receivable 0 0
Doubtful [Member]
   
Financing Receivable 43 59
Commercial and Industrial [Member]
   
Financing Receivable 55,401 62,188
Real Estate Construction [Member]
   
Financing Receivable 22,817 22,522
Residential Real Estate Mortgage [Member]
   
Financing Receivable 199,063 203,872
Commercial Real Estate Mortgage [Member]
   
Financing Receivable 125,799 115,734
Consumer Installment [Member]
   
Financing Receivable $ 3,974 $ 4,117