RESTRUCTURING CHARGES - Schedule of Restructuring Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 1,720	$ 0
Restructuring charges to operations	62	2,657
Cash payments	(1,863)	(896)
Other adjustments	81	(41)
Ending Balance	0	1,720
Employee-Related | VSP
Restructuring Reserve [Roll Forward]
Beginning Balance	0	0
Restructuring charges to operations	0	123
Cash payments	0	(123)
Other adjustments	0	0
Ending Balance	0	0
Employee-Related | Q2 FY20 Plan
Restructuring Reserve [Roll Forward]
Beginning Balance	3	0
Restructuring charges to operations	0	465
Cash payments	(3)	(434)
Other adjustments	0	(28)
Ending Balance	0	3
Employee-Related | Q4 FY20 Plan
Restructuring Reserve [Roll Forward]
Beginning Balance	1,717	0
Restructuring charges to operations	62	2,069
Cash payments	(1,860)	(339)
Other adjustments	81	(13)
Ending Balance	$ 0	$ 1,717