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TRADE AND OTHER PAYABLES (Schedule of Trade and Other Payables) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Trade and other current payables [abstract]    
Trade payables $ 8,116 $ 8,045
Payroll taxes 448 423
Employee related social insurance 154 151
Accrued liabilities 7,878 11,618
Deferred income 312 278
Total trade and other payables $ 16,908 $ 20,515