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Note 10 - Short-term Borrowings (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Short-term Debt [Table Text Block]
(Dollar amounts in thousands)
 
2018
   
2017
 
                 
Balance at year-end
  $
90,398
    $
74,707
 
Average balance outstanding
   
42,231
     
63,910
 
Maximum month-end balance
   
101,857
     
114,025
 
Weighted-average rate at year-end
   
2.53
%    
1.36
%
Weighted-average rate during the year
   
1.99
%    
1.18
%
Schedule of Repurchase Agreements [Table Text Block]
(Dollar amounts in thousands)
 
December 31, 2017
 
         
Repurchase agreements secured by:
       
Mortgage-backed securities in government sponsored entities
  $
2,040
 
Tax-exempt obligations of states and political subdivisions
   
495
 
Gross amount of pledged collateral
   
2,535
 
         
Gross amount of recognized liabilities
  $
1,989