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Note 10 - Borrowings (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Federal Home Loan Bank, Advances [Table Text Block]
   
At December 31,
  
Maturity
  
2019
    
2018
  
Year one
  
$
40,000,000
    $
27,000,000
  
Year two
  
 
-
     
40,000,000
  
Year three
  
 
-
     
-
  
Year four
  
 
-
     
-
  
Total borrowings
  
$
40,000,000
    $
67,000,000