REVENUE RECOGNITION - Disaggregation of Revenue (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($) segment
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Number of reportable segment | segment	1	1
Revenues	$ 92,382	$ 93,896
United States
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	56,369	59,314
Europe
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	33,133	34,167
Other
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	2,880	415
Vehicle
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	28,055	33,596
Industrial
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	33,351	31,311
Medical
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	14,551	12,410
Aerospace & Defense
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	11,142	11,253
Other
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	$ 5,283	$ 5,326