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STOCK-BASED COMPENSATION Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
May 24, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Common Stock, Capital Shares Reserved for Future Issuance         240,000
Common stock reserved for issuance to participants 47,768   47,768    
Stock-based compensation $ 425 $ 178 $ 609 $ 874  
Restricted stock units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Shares Earned Above Target     723 24,486  
Granted, Number of share of restricted stock (shares)     78,978 52,151  
Stock-based compensation 425 178 $ 609 $ 874  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Shares Earned Above Target, Weighted Average Grant Date Fair Value     $ 17.00 $ 10.00  
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures     50,834    
Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock Option Award Exercise Price as a Percentage of the Fair Market Value of a Share of Common Stock     100.00%    
Stock-based compensation $ 0 $ 0 $ 0 $ 0  
Non-Employee Director | Restricted stock units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted, Number of share of restricted stock (shares)     28,144    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number 128,001   128,001    
Americas, Asia Pacific and Europe [Member] | Restricted stock units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other that Options, Percentage of Shares Issued Based on Performance of Adjusted EBITDA     70.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other that Options, Percentage of Shares Issued Based on Performance of Group Adjusted EBITDA     30.00%    
Corporate | Restricted stock units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other that Options, Percentage of Shares Issued Based on Performance of Adjusted EBITDA     75.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other that Options, Percentage of Shares Issued Based on Performance of Group Adjusted EBITDA     25.00%    
Share-based Compensation Award, Tranche One [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     33.00%    
Share-based Compensation Award, Tranche One [Member] | Restricted stock units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance and service conditions     19,500    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     66.60%    
Share-based Compensation Award, Tranche Two [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     33.00%    
Share-based Compensation Award, Tranche Two [Member] | Restricted stock units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance and service conditions     31,334    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     16.70%    
Share-based Compensation Award, Tranche Three [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     34.00%    
Share-based Compensation Award, Tranche Three [Member] | Restricted stock units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     16.70%