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EARNINGS (LOSS) PER SHARE (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Earnings Per Share Reconciliation [Abstract]        
Net loss attributable to stockholders, basic $ (4,222) $ (3,728) $ (13,169) $ (10,369)
Net loss attributable to stockholders, diluted $ (4,222) $ (3,728) $ (13,169) $ (10,369)
Denominator:        
Weighted average shares outstanding - basic (in shares) 34,330 34,216 34,318 34,193
Weighted average shares outstanding - diluted (in shares) 34,330 34,216 34,318 34,193
Loss per share:        
Basic (in dollars per share) $ (0.12) $ (0.11) $ (0.38) $ (0.30)
Diluted (in dollars per share) $ (0.12) $ (0.11) $ (0.38) $ (0.30)
Restricted stock        
Anti-dilutive instruments excluded from diluted loss per common share:        
Anti-dilutive instruments (in shares) 0 45 0 45
Options        
Anti-dilutive instruments excluded from diluted loss per common share:        
Anti-dilutive instruments (in shares) 5,534 5,028 5,534 5,028