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Earnings per share (Tables)
 12 Months Ended
Dec. 31, 2019
Earnings per share [Abstract]  
Earnings per share
For 2019, 2018, and 2017, earnings per share was computed as follows (in thousands, except per share amounts):

 
 
Year Ended December 31,
 
 
 
2019
  
2018
  
2017
 
Net income
 
$
516
  
$
5,426
  
$
3,211
 
 
            
Shares:
            
Basic:  Weighted average common shares outstanding
  
7,466
   
7,444
   
7,423
 
Add:  Dilutive effect of outstanding equity awards as determined by the treasury stock method
  
211
   
315
   
169
 
Diluted:  Weighted average common and common equivalent shares outstanding
  
7,677
   
7,759
   
7,592
 
 
            
Net income per common share:
            
Basic
 
$
0.07
  
$
0.73
  
$
0.43
 
Diluted
  
0.07
   
0.70
   
0.42