PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Prepaid expense and other assets	$ 8,749	$ 7,855
Prepaid licenses, permits and tolls
Prepaid expense and other assets	1,677	1,438
Prepaid insurance
Prepaid expense and other assets	5,374	4,596
Other
Prepaid expense and other assets	$ 1,698	$ 1,821