LONG-LIVED ASSETS Long-Lived Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Long-lived assets excluding goodwill and intangibles	$ 31,014	$ 32,718
United States [Member]
Long-lived assets excluding goodwill and intangibles	23,774	24,292
Other Countries [Member]
Long-lived assets excluding goodwill and intangibles	$ 7,240	$ 8,426