REVENUE RECOGNITION - Disaggregation of Revenue (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Number of reportable segment | segment	1
Revenues	$ 403,516	$ 366,694	$ 371,084
Vehicle
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	129,835	110,365	126,811
Industrial
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	135,440	114,143	124,196
Medical
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	86,129	83,191	51,586
Aerospace & Defense
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	31,746	39,711	47,748
Other
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	20,366	19,284	20,743
United States
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	239,528	214,203	244,347
Europe
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	129,414	126,985	124,914
Asia-Pacific
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions
Revenues	$ 34,574	$ 25,506	$ 1,823