OTHER NON-CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Income tax liabilities	$ 5,227	$ 5,955
Deferred revenue	21	2,101
Other non-current liabilities	2,618	4,226
Total	$ 7,866	$ 12,282