OTHER NON-CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Other Liabilities Disclosure [Abstract]
Operating lease liabilities	$ 7,055	$ 12,281
Income tax liabilities	12,322	12,414
Deferred revenue	289	504
Other non-current liabilities	50	40
Total	$ 19,716	$ 25,239