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Note 4 - Loans And Related Allowance For Loan Losses (Detail) - Classes of the Loan Portfolio Summarized by Credit Quality (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Financing Receivable $ 408,433 $ 401,880
Pass [Member] | Commercial and Industrial [Member]
   
Financing Receivable 59,390 53,645
Pass [Member] | Real Estate Construction [Member]
   
Financing Receivable 17,601 20,883
Pass [Member] | Residential Real Estate Mortgage [Member]
   
Financing Receivable 190,967 192,534
Pass [Member] | Commercial Real Estate Mortgage [Member]
   
Financing Receivable 106,509 100,536
Pass [Member] | Consumer Installment [Member]
   
Financing Receivable 4,084 4,495
Pass [Member]
   
Financing Receivable 378,551 372,093
Special Mention [Member] | Commercial and Industrial [Member]
   
Financing Receivable 678 1,104
Special Mention [Member] | Real Estate Construction [Member]
   
Financing Receivable 0 0
Special Mention [Member] | Residential Real Estate Mortgage [Member]
   
Financing Receivable 758 1,100
Special Mention [Member] | Commercial Real Estate Mortgage [Member]
   
Financing Receivable 1,928 443
Special Mention [Member] | Consumer Installment [Member]
   
Financing Receivable 0 6
Special Mention [Member]
   
Financing Receivable 3,364 2,653
Substandard [Member] | Commercial and Industrial [Member]
   
Financing Receivable 2,061 4,363
Substandard [Member] | Real Estate Construction [Member]
   
Financing Receivable 4,921 662
Substandard [Member] | Residential Real Estate Mortgage [Member]
   
Financing Receivable 12,147 14,505
Substandard [Member] | Commercial Real Estate Mortgage [Member]
   
Financing Receivable 7,297 7,523
Substandard [Member] | Consumer Installment [Member]
   
Financing Receivable 33 8
Substandard [Member]
   
Financing Receivable 26,459 27,061
Doubtful [Member] | Commercial and Industrial [Member]
   
Financing Receivable 59 73
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 59 73
Commercial and Industrial [Member]
   
Financing Receivable 62,188 59,185
Real Estate Construction [Member]
   
Financing Receivable 22,522 21,545
Residential Real Estate Mortgage [Member]
   
Financing Receivable 203,872 208,139
Commercial Real Estate Mortgage [Member]
   
Financing Receivable 115,734 108,502
Consumer Installment [Member]
   
Financing Receivable $ 4,117 $ 4,509