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SHAREHOLDERS’ EQUITY AND SHARE-BASED COMPENSATION - Summary of Activity Related to Awards (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Number of options    
Outstanding at the beginning of the period (in shares) 1,468,046  
Forfeited/expired (in shares) (526,454)  
Outstanding at the end of the period (in shares) 941,592 1,468,046
Exercisable at the end of the period (in shares) 587,899  
Weighted average exercise price    
Outstanding at the beginning of the period (in usd per share) $ 29.19  
Forfeited/expired (in usd per share) 23.86  
Outstanding at the end of the period (in usd per share) 32.17 $ 29.19
Exercisable at the end of the period (in usd per share) $ 28.53  
Weighted average contractual term (in years)    
Weighted average contractual term 5 years 10 months 6 days 4 years 7 months 6 days
Exercisable at the end of the period 5 years 7 months 20 days  
Aggregate intrinsic value (in thousands)    
Aggregate intrinsic value, beginning balance (in dollars) $ 94  
Aggregate intrinsic value, ending balance (in dollars) 0 $ 94
Exercisable at the end of the period (in dollars) $ 0