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Note 4 - Loans and Related Allowance for Loan Losses (Details) - Classes of the Loan Portfolio Summarized by Credit Quality - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | $ 533,710 | $ 470,584
Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 512,697 | 448,759
Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 5,297 | 4,987
Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 15,586 | 16,211
Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 130 | 627
Commercial and Industrial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 42,536 | 34,928
Commercial and Industrial [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 40,560 | 33,160
Commercial and Industrial [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 242 | 0
Commercial and Industrial [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 1,734 | 1,730
Commercial and Industrial [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 0 | 38
Real Estate Construction Porfolio Segment [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 22,137 | 30,296
Real Estate Construction Porfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 22,007 | 29,212
Real Estate Construction Porfolio Segment [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 0 | 495
Real Estate Construction Porfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 0 | 0
Real Estate Construction Porfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 130 | 589
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 232,478 | 210,096
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 225,945 | 200,928
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 728 | 584
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 5,805 | 8,584
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 0 | 0
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 231,701 | 190,685
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 219,331 | 180,899
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 4,327 | 3,908
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 8,043 | 5,878
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 0 | 0
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 4,858 | 4,579
Consumer Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 4,854 | 4,572
Consumer Portfolio Segment [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 0 | 0
Consumer Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | 4 | 7
Consumer Portfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans, total | $ 0 | $ 0

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