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FINANCIAL INSTRUMENTS - Put and call option on minority interest (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 26, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Oct. 22, 2015
Disclosure of contingent liabilities in business combination [line items]          
Payment of call and put options $ 1,186        
Gain on remeasurement of valuation of call and put option over non-controlling interest   $ 1,611 $ 1,726    
Derecognition of call option over non-controlling interest   $ 455      
Gain (loss) on remeasurement, reimbursement rights     $ 1,726    
Major business combination | Dynaflows S.A.          
Disclosure of contingent liabilities in business combination [line items]          
Put option contract written, percentage of ownership interest       33.27% 33.27%