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Intangible Assets and Goodwill - Summary of Intangible Assets and Goodwill (Parenthetical) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disclosure Of Reconciliation Of Changes In Intangible Assets And Goodwill [Abstract]    
Additions of intangible assets under development $ 7,741 $ 8,488
Transfer from intangible assets under development $ (7,975) $ (7,983)