PREPAID EXPENSES AND OTHER ASSETS (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid license	$ 1,209	$ 2,419
Spare parts	1,857	1,597
Insurance receivable	1,148	0
Other prepaid expenses and assets	733	648
Total	$ 4,947	$ 4,664