DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Summary of Effect of Foreign Exchange Forward Contracts on Other Comprehensive Income And Results Of Operations (Details) - Designated as Hedging Instrument - Cash Flow Hedging - Forward contracts - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative	$ (103)	$ (696)
Gain (Loss) Reclassified from Accumulated OCI into Income	28	575
Research and development
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivative	(103)	(696)
Gain (Loss) Reclassified from Accumulated OCI into Income	(19)	164
Sales and marketing
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income	$ 47	$ 411