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Earnings per share
 12 Months Ended
Dec. 31, 2021
Earnings per share [Abstract]  
Earnings per share
12. Earnings per share

Earnings per share was computed as follows (in thousands, except per share amounts):

   
Year Ended December 31,
  
 
2021
    
2020
  
Net loss
  
$
(4,145
)
  
$
(5,630
)
                 
Shares:
                
Basic:  Weighted average common shares outstanding
    
9,298
      
7,827
  
Add:  Dilutive effect of outstanding equity awards as determined by the treasury stock method
    
–
      
–
  
Diluted:  Weighted average common and common equivalent shares outstanding
    
9,298
      
7,827
  
                 
Net loss per common share:
                
Basic
  
$
(0.45
)
  
$
(0.72
)
Diluted
    
(0.45
)
    
(0.72
)

The computation of diluted earnings per share excludes the effect of the potential exercise of stock awards, including stock options, restricted stock units and performance stock awards, when the average market price of the common stock is lower than the exercise price of the related stock award during the period.  These outstanding stock awards are not included in the computation of diluted earnings per share because the effect would be anti-dilutive.  Furthermore, in periods when a net loss is reported, such as 2021 and 2020, basic and diluted net loss per common share are calculated using the same method.  Anti-dilutive stock awards excluded from the computation of earnings per dilutive share were 391,000 and 1,284,000 at December 31, 2021 and 2020, respectively.