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Earnings per share (Tables)
 9 Months Ended
Sep. 30, 2018
Earnings per share [Abstract]  
Earnings per share
The following table sets forth the reconciliation of basic weighted average shares outstanding and diluted weighted average shares outstanding:

 
 
Three Months Ended
September 30,
  
Nine Months Ended
September 30,
 
 
 
2018
  
2017
  
2018
  
2017
 
 
 
(In thousands, except per share data)
 
 
            
             
Net income
 
$
2,574
  
$
1,813
  
$
4,464
  
$
3,623
 
                 
Shares:
                
Basic:  Weighted average common shares outstanding
  
7,413
   
7,408
   
7,449
   
7,404
 
Add:  Dilutive effect of outstanding options and restricted stock units as determined by the treasury stock method
  
345
   
178
   
325
   
100
 
Diluted:  Weighted average common and common equivalent shares outstanding
  
7,758
   
7,586
   
7,774
   
7,504
 
                 
Net income per common share:
                
Basic
 
$
0.35
  
$
0.24
  
$
0.60
  
$
0.49
 
Diluted
 
$
0.33
  
$
0.24
  
$
0.57
  
$
0.48