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NET INCOME (LOSS) PER SHARE - Anti-Dilutive Awards Excluded from Calculation (Details) - shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share    
Weighted average number of securities excluded from calculation 410,100 667,231
Stock options    
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share    
Weighted average number of securities excluded from calculation   87,497
Restricted stock units    
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share    
Weighted average number of securities excluded from calculation 410,100 546,747
Restricted stock awards    
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share    
Weighted average number of securities excluded from calculation   32,987