GEOGRAPHIC AND SEGMENT INFORMATION (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($) segment	Dec. 31, 2018 USD ($)
Number of reportable operating segment | segment	3
Long-term assets	$ 24,814	$ 25,778
United States
Long-term assets	$ 24,400	$ 25,800
Percentage of assets (as a percent)	100.00%