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Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment in Loans by Risk Category - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans $ 303,432 $ 306,485 $ 294,478
Pass [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans 294,493 292,442 279,249
Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans 2,413 3,937 4,066
Substandard [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans 4,881 6,967 5,904
Doubtful [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans 1,645 3,139 5,259
Unlikely to be Collected Financing Receivable [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans $ 0 0 0
Residential Mortgage Segment [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   107,096 107,508
Residential Mortgage Segment [Member] | Pass [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   104,780 103,594
Residential Mortgage Segment [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   105 756
Residential Mortgage Segment [Member] | Substandard [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   1,292 1,625
Residential Mortgage Segment [Member] | Doubtful [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   919 1,533
Residential Mortgage 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   11,080 10,360
Land Segment [Member] | Pass [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   7,969 7,096
Land Segment [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   94 0
Land Segment [Member] | Substandard [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   3,001 3,144
Land Segment [Member] | Doubtful [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   16 120
Land 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   8,463 9,018
Residential Construction Segment [Member] | Pass [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   7,722 9,018
Residential Construction Segment [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   741 0
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
Commercial Real Estate Portfolio Segment [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   78,480 76,666
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   73,204 71,893
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   2,648 2,627
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   2,195 690
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   433 1,456
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 Portfolio Segment [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   28,406 22,003
Commercial Portfolio Segment [Member] | Pass [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   26,137 19,328
Commercial Portfolio Segment [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   298 458
Commercial Portfolio Segment [Member] | Substandard [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   329 319
Commercial Portfolio Segment [Member] | Doubtful [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   1,642 1,898
Commercial Portfolio Segment [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   38,125 35,269
Home Equity And Second Mortgage [Member] | Pass [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   37,860 34,693
Home Equity And Second Mortgage [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   2 198
Home Equity And Second Mortgage [Member] | Substandard [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   134 126
Home Equity And Second Mortgage [Member] | Doubtful [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   129 252
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
Consumer Portfolio Segment [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   34,835 33,654
Consumer Portfolio Segment [Member] | Pass [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   34,770 33,627
Consumer Portfolio Segment [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   49 27
Consumer Portfolio Segment [Member] | Substandard [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Recorded investment in loans   16 0
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