Leases - Summary of Components of Operating Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease costs	$ 8,235	$ 9,558
Short-term lease costs	25	102
Variable lease costs	1,444	827
Less: Sublease income	(514)	(178)
Total operating lease costs	$ 9,190	$ 10,309	$ 8,174