RESTRUCTURING CHARGES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018	Mar. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,147	$ 167
Q4 FY2017 Plan | Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 200	$ 900	$ 1,900
Q4 FY2017 Plan | Facility-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ 400
Q3 FY 2018 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,100
Expected restructuring costs to be recorded	$ 100
Q3 FY 2018 Plan | Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 5,100