RESTRUCTURING EXPENSE (Restructuring by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2020
Restructuring Cost And Reserve [Line Items]
Total restructuring charges	$ 400	$ 391
Operating Segments | Services Group
Restructuring Cost And Reserve [Line Items]
Total restructuring charges		139
Operating Segments | Orion Distribution Systems
Restructuring Cost And Reserve [Line Items]
Total restructuring charges		142
Corporate and Other
Restructuring Cost And Reserve [Line Items]
Total restructuring charges		$ 110