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Finance Income and Costs - Schedule of Finance Income and Costs (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Disclosure Of Finance Income Expense [Abstract]      
Interest income on term deposits $ 6,618 $ 4,628 $ 2,845
Change in fair value of financial asset measured at FVTPL 4   30
Change in fair value of financial liability measured at FVTPL   350  
Other interest income 3,362 2,554 487
Net foreign exchange gain   4,568  
Finance income 9,984 12,100 3,362
Interest expense on financial liabilities measured at amortised cost 13,744 2,035 157
Change in fair value of financial liability measured at FVTPL 1,181   1,421
Net foreign exchange loss 8,218   13,734
Impairment loss on trade and other receivables 904 358 1,563
Interest expense on lease liabilities 1,569 1,867 2,731
Finance and other charges 710 538 1,827
Finance costs 26,326 4,798 21,433
Net finance income (costs) $ (16,342) $ 7,302 $ (18,071)