OTHER NON-CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Income tax liabilities	$ 5,605	$ 5,955
Deferred revenue	41	2,101
Other non-current liabilities	3,761	4,226
Total	$ 9,407	$ 12,282