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Earnings per share (Tables)
 6 Months Ended
Jun. 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
June 30,
  
Six Months Ended
June 30,
 
 
 
2018
  
2017
  
2018
  
2017
 
 
 
(In thousands, except per share data)
 
 
            
             
Net income
 
$
1,210
  
$
867
  
$
1,890
  
$
1,810
 
                 
Shares:
                
Basic:  Weighted average common shares outstanding
  
7,401
   
7,408
   
7,467
   
7,402
 
Add:  Dilutive effect of outstanding options and restricted stock units as determined by the treasury stock method
  
259
   
106
   
315
   
67
 
Diluted:  Weighted average common and common equivalent shares outstanding
  
7,660
   
7,514
   
7,782
   
7,469
 
                 
Net income per common share:
                
Basic
 
$
0.16
  
$
0.12
  
$
0.25
  
$
0.24
 
Diluted
 
$
0.16
  
$
0.12
  
$
0.24
  
$
0.24