PREPAID EXPENSES AND OTHER CURRENT ASSETS & INTANGIBLE ASSETS - Schedule of Prepaid Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Prepaid income tax (see Note 10)	$ 2,331	$ 0
Other prepaid expenses and other current assets	701	765
Total	$ 3,032	$ 765