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EARNINGS PER COMMON SHARE (Tables)
9 Months Ended
Sep. 30, 2021
Net income (loss) per share:  
Reconciliation of number of shares in earnings per share calculation
                    
   Three months ended   Nine months ended 
   September 30,   September 30, 
   2021   2020   2021   2020 
Weighted average common shares outstanding - basic   12,389    12,390    12,389    12,531 
Dilutive effect of common stock equivalents   56        52     
Weighted average common shares outstanding - diluted   12,445    12,390    12,441    12,531