PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Maintenance agreements, current portion	$ 2,513	$ 1,923
Income taxes receivable	7,053	5,098
Prepaid expenses	4,812	3,924
Other current assets	5,101	4,269
Total	$ 19,479	$ 15,214