Note 3 - Loans and Allowance for Loan Losses (Details) - Recorded Investment in Loans by Risk Category (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans $ 301,660 $ 306,485
Residential Mortgage Segment [Member] | Pass [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 101,845 104,780
Residential Mortgage Segment [Member] | Special Mention [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 102 105
Residential Mortgage Segment [Member] | Substandard [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 1,326 1,292
Residential Mortgage Segment [Member] | Doubtful [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 1,066 919
Residential Mortgage Segment [Member] | Unlikely to be Collected Financing Receivable [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 0 0
Residential Mortgage Segment [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 104,339 107,096
Land Segment [Member] | Pass [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 8,050 7,969
Land Segment [Member] | Special Mention [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 93 94
Land Segment [Member] | Substandard [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 2,945 3,001
Land Segment [Member] | Doubtful [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 19 16
Land Segment [Member] | Unlikely to be Collected Financing Receivable [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 0 0
Land Segment [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 11,107 11,080
Residential Construction Segment [Member] | Pass [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 8,011 7,722
Residential Construction Segment [Member] | Special Mention [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 740 741
Residential Construction Segment [Member] | Substandard [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 0 0
Residential Construction Segment [Member] | Doubtful [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 0 0
Residential Construction Segment [Member] | Unlikely to be Collected Financing Receivable [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 0 0
Residential Construction Segment [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 8,751 8,463
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 73,572 73,204
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 1,659 2,648
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 2,297 2,195
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 437 433
Commercial Real Estate Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 0 0
Commercial Real Estate Portfolio Segment [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 77,965 78,480
Commercial Portfolio Segment [Member] | Pass [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 24,440 26,137
Commercial Portfolio Segment [Member] | Special Mention [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 268 298
Commercial Portfolio Segment [Member] | Substandard [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 329 329
Commercial Portfolio Segment [Member] | Doubtful [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 61 1,642
Commercial Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 0 0
Commercial Portfolio Segment [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 25,098 28,406
Home Equity And Second Mortgage [Member] | Pass [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 38,359 37,860
Home Equity And Second Mortgage [Member] | Special Mention [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 2 2
Home Equity And Second Mortgage [Member] | Substandard [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 95 134
Home Equity And Second Mortgage [Member] | Doubtful [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 126 129
Home Equity And Second Mortgage [Member] | Unlikely to be Collected Financing Receivable [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 0 0
Home Equity And Second Mortgage [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 38,582 38,125
Consumer Portfolio Segment [Member] | Pass [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 35,765 34,770
Consumer Portfolio Segment [Member] | Special Mention [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 37 49
Consumer Portfolio Segment [Member] | Substandard [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 16 16
Consumer Portfolio Segment [Member] | Doubtful [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 0 0
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 0 0
Consumer Portfolio Segment [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 35,818 34,835
Pass [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 290,042 292,442
Special Mention [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 2,901 3,937
Substandard [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 7,008 6,967
Doubtful [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans 1,709 3,139
Unlikely to be Collected Financing Receivable [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Recorded investment in loans $ 0 $ 0