RESTRUCTURING EXPENSE (Restructuring by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restructuring Cost And Reserve [Line Items]
Total restructuring charges	$ 43	$ 2,146
Operating Segments | Orion Distribution Systems
Restructuring Cost And Reserve [Line Items]
Total restructuring charges	12	117
Corporate and Other
Restructuring Cost And Reserve [Line Items]
Total restructuring charges	$ 31	$ 2,029