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Note 10 - Long-term Debt (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Federal Home Loan Bank, Advances, by Branch of FHLB Bank [Table Text Block]
   
2016
    
2015
  
   
(Dollars in Thousands)
  
Balance at year-end
   $
15,000
     $
5,000
  
Average balance during the year
    
12,404
      
4,178
  
Maximum month-end balance during the year
    
15,000
      
5,000
  
Average rate paid during the year
    
0.71
%
    
0.59
%
Weighted average remaining
maturity (in years)
    
0.67 years
      
1.33 years