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Earnings per share (Tables)
 9 Months Ended
Sep. 30, 2019
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,
 
  
2019
  
2018
  
2019
  
2018
 
  
(In thousands, except per share data)
 
             
             
Net income
 
$
384
  
$
2,574
  
$
1,316
  
$
4,464
 
                 
Shares:
                
Basic:  Weighted average common shares outstanding
  
7,470
   
7,413
   
7,464
   
7,449
 
Add:  Dilutive effect of outstanding options and restricted stock units as determined by the treasury stock method
  
283
   
345
   
194
   
325
 
Diluted:  Weighted average common and common equivalent shares outstanding
  
7,753
   
7,758
   
7,658
   
7,774
 
                 
Net income per common share:
                
Basic
 
$
0.05
  
$
0.35
  
$
0.18
  
$
0.60
 
Diluted
 
$
0.05
  
$
0.33
  
$
0.17
  
$
0.57