INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount of finite and indefinite lived intangible assets	$ 51,498	$ 51,587
Accumulated Amortization/Impairment	(37,562)	(37,270)
Total	13,936	14,317	$ 14,317
Trade name / trademark
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount of finite and indefinite lived intangible assets	12,305	12,311
Accumulated Amortization/Impairment	(1,698)	(1,704)
Total	10,607	10,607
Core technology
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount of finite lived intangible assets	13,315	13,356
Accumulated Amortization/Impairment	(13,119)	(13,014)
Total	196	342
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount of finite lived intangible assets	25,566	25,608
Accumulated Amortization/Impairment	(22,433)	(22,240)
Total	3,133	3,368
Patents and Other
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount of finite lived intangible assets	312	312
Accumulated Amortization/Impairment	(312)	(312)
Trade name
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	$ 10,600	$ 10,600