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Note 9 - Borrowings (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Federal Home Loan Bank, Advances [Table Text Block]
   
At December 31,
  
Maturity
  
2018
    
2017
  
Year one
  
$
27,000,000
     $
35,000,000
  
Year two
  
 
40,000,000
      
-
  
Year three
  
 
-
      
10,000,000
  
Year four
  
 
-
      
-
  
Total borrowings  
$
67,000,000
     $
45,000,000