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TERM FACILITY (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Term Facility      
Balance at beginning of the period $ 8,667 $ 9,334 $ 10,000
Repayments (2,000) (667) (666)
Fair value adjustment for modification 234
Balance at end of the period 6,901 8,667 9,334
Less: Current portion (1,017) (4,000) (4,666)
Non-current portion $ 5,884 $ 4,667 $ 4,667