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EXCHANGEABLE NOTES (Schedule of Exchangeable Notes) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Non-current assets    
Exchangeable note bond call option
Non-current liabilities    
Exchangeable note equity conversion option 4 238
Exchangeable note bond put option
Total non-current liabilities 4 238
Total value of embedded derivatives - net liability $ 4 $ 238