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Related Parties - Summary of Transaction with Entity Providing Key Management Personnel Services (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Disclosure Of Transactions Between Related Parties [Abstract]      
Key management personnel services $ 7 $ 5 $ 4
Consultancy services $ 16 $ 13 $ 28