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STOCK-BASED COMPENSATION - FOR THE YEAR (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
May 24, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock reserved for issuance to participants 33,340   240,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense $ 31 $ 15  
Restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Shares Issued under a Share-based Compensation Arrangement, Which Have Vesting Conditions associated with Performance and Service Conditions 19,500    
Granted, number of share of restricted stock (units) 88,906 71,760  
Stock-based compensation $ 961 $ 1,539  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 278 $ 294  
Weighted average service period 11 months 5 days 1 year 8 months 9 days  
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%    
Non employee director restricted stock unit      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted, number of share of restricted stock (units) 38,072    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number 141,412    
First Anniversary      
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%    
First Anniversary | 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 66.60%    
Second Anniversary      
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%    
Second Anniversary | Restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Shares Issued under a Share-based Compensation Arrangement, Which Have Vesting Conditions associated with Performance and Service Conditions 31,334    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 16.70%    
Third Anniversary      
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%    
Third Anniversary | 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%    
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, Non-Segment [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 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%    
Minimum | Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 5 years    
Maximum | Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years