Interest Income, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Other Income And Expenses [Abstract]
Interest expense	$ (11)	$ (7)
Interest income	68	158
Interest income, net	$ 57	$ 151

Amount of the cost of borrowed funds accounted for as interest expense.

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Name:	us-gaap_InterestExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration