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INTANGIBLE ASSETS (Details) - Patent licensing fee - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Intangible assets    
Useful life 15 years  
Intangible assets - gross $ 200 $ 200
Accumulated amortization (139) (122)
Total $ 61 $ 78