Accounts Receivable - Summary of Changes in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Receivables [Abstract]
Balance	$ (3,549)	$ (6,054)
Additions charged to costs and expenses	(2,834)	(3,367)	$ (5,644)
Deductions	2,178	5,872
Balance	$ (4,205)	$ (3,549)	$ (6,054)