INFORMATION ABOUT REVENUE AND GEOGRAPHIC AREAS (Long-Lived Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 110,141	$ 110,949
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	108,634	109,849
All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 1,507	$ 1,100