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Note 4 - Premises and Equipment, Net (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
September 30,
2019
   
December 31,
2018
 
                 
Land and improvements
  $
18,217,000
    $
18,198,000
 
Buildings
   
51,140,000
     
45,362,000
 
Furniture and equipment
   
21,285,000
     
18,139,000
 
     
90,642,000
     
81,699,000
 
Less: accumulated depreciation
   
36,057,000
     
33,378,000
 
                 
Premises and equipment, net
  $
54,585,000
    $
48,321,000