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Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance for Loan Losses and the Recorded Investment of Loans Based On Impairment Method - USD ($)
$ in Thousands
Sep. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Dec. 31, 2013
Ending allowance balance attributable to loans:            
Individually evaluated for impairment $ 2,093   $ 3,412      
Collectively evaluated for impairment 4,809   4,922      
Total ending allowance balance 6,902 $ 7,444 8,334 $ 6,964 $ 7,928 $ 6,155
Loans:            
Loans individually evaluated for impairment 16,879   20,169      
Loans collectively evaluated for impairment 568,289   574,599      
Total ending loans balance 585,168   594,768      
Residential Portfolio Segment [Member]            
Ending allowance balance attributable to loans:            
Individually evaluated for impairment 66          
Collectively evaluated for impairment 1,177   1,426      
Total ending allowance balance 1,243 1,230 1,426 1,580 1,878 1,169
Loans:            
Loans individually evaluated for impairment 1,898   1,415      
Loans collectively evaluated for impairment 222,594   222,213      
Total ending loans balance 224,492   223,628      
Commercial Real Estate Portfolio Segment [Member]            
Ending allowance balance attributable to loans:            
Individually evaluated for impairment 313   2,506      
Collectively evaluated for impairment 1,687   1,689      
Total ending allowance balance 2,000 2,795 4,195 2,650 3,276 2,914
Loans:            
Loans individually evaluated for impairment 7,496   11,711      
Loans collectively evaluated for impairment 159,044   165,901      
Total ending loans balance 166,540   177,612      
Commercial Portfolio Segment [Member]            
Ending allowance balance attributable to loans:            
Individually evaluated for impairment 1,711   900      
Collectively evaluated for impairment 792   702      
Total ending allowance balance 2,503 2,287 1,602 1,612 1,625 1,279
Loans:            
Loans individually evaluated for impairment 7,267   6,824      
Loans collectively evaluated for impairment 77,135   77,174      
Total ending loans balance 84,402   83,998      
Consumer Portfolio Segment [Member]            
Ending allowance balance attributable to loans:            
Individually evaluated for impairment 3   6      
Collectively evaluated for impairment 1,153   1,105      
Total ending allowance balance 1,156 $ 1,132 1,111 $ 1,122 $ 1,149 $ 793
Loans:            
Loans individually evaluated for impairment 218   219      
Loans collectively evaluated for impairment 109,516   109,311      
Total ending loans balance $ 109,734   $ 109,530