Restructuring - Summary of amount incurred and accrued related to one-time employee termination benefits (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred during the period	[1]	$ 0	$ 0	$ 44,692
One-time Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs		$ 0	1,053	0
Restructuring charges incurred during the period				4,633
Amounts paid during the period			(1,053)	(3,580)
Accrued restructuring costs			$ 0	$ 1,053

[1] For the year ended March 31, 2020, restructuring includes $0.9 million of stock-based compensation expense related to restructuring activities.