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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%

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