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NET INCOME PER COMMON SHARE (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Basic:        
Net income (loss) $ 4,106 $ 612 $ 7,530 $ (747)
Weighted average common shares (in shares) 48,307 47,601 48,406 47,458
Earnings (loss) per share (in dollars per share) $ 0.08 $ 0.01 $ 0.16 $ (0.02)
Diluted:        
Net income (loss) $ 4,106 $ 612 $ 7,530 $ (747)
Basic weighted average common shares (in shares) 48,307 47,601 48,406 47,458
Potential common shares (in shares) 3,008 1,361 3,408  
Diluted weighted average common shares (in shares) 51,315 48,962 51,814 47,458
Diluted earnings (loss) per share (in dollars per share) $ 0.08 $ 0.01 $ 0.15 $ (0.02)