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Note 3 - Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Comprehensive Income (Loss) [Table Text Block]
   
For the years ended December 31,
  
   
2019
    
2018
    
2017
  
 
  
Before
    
Tax
    
Net
    
Before
    
Tax
    
Net
    
Before
    
Tax
    
Net
  
(Dollars in thousands
)		  
Tax
    
Effect
    
of Tax
    
Tax
    
Effect
    
of Tax
    
Tax
    
Effect
    
of Tax
  
Securities available for sale:                                                                        
Unrealized gains (losses) arising during the period
  
$
1,585
    
 
443
    
 
1,142
      
(94
 )    
(25
 )    
(69
 )    
33
      
12
      
21
  
Reclassification of certain income tax effects from accumulated other comprehensive income
(1)
  
 
0
    
 
0
    
 
0
      
0
      
0
      
0
      
0
      
(158
 )    
158
  
Other comprehensive income (loss)
  
$
1,585
    
 
443
    
 
1,142
      
(94
 )    
(25
 )    
(69
 )    
33
      
170
      
(137
 )