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BUSINESS COMBINATIONS - Minority Interest Purchase Agreement (Dynaflows) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 26, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Oct. 22, 2015
Disclosure of detailed information about business combination [line items]          
Gain on remeasurement of valuation of call and put option over non-controlling interest   $ 1,611 $ 1,726    
Other financial liabilities   3,418   $ 1,617  
Derecognition of call option over non-controlling interest   $ 455      
Dynaflows S.A.          
Disclosure of detailed information about business combination [line items]          
Value of share options exercised in share-based payment arrangement $ 1,186        
Other financial liabilities     $ 2,797    
Financial liabilities, discounted interest rate     3.50%    
Major business combination | Dynaflows S.A.          
Disclosure of detailed information about business combination [line items]          
Put option contract written, percentage of ownership interest       33.27% 33.27%