OTHER NON-CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities, Noncurrent [Abstract]
Income tax liabilities	$ 7,069	$ 5,955
Deferred revenue	19	2,101
Other non-current liabilities	2,090	4,226
Total	$ 9,178	$ 12,282