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Other Investments - Schedule of Investment (Detail) - USD ($)
$ in Thousands
Mar. 31, 2022
Mar. 31, 2021
Disclosure Of Financial Assets [Line Items]    
Total other investments $ 4,031 $ 5,508
Financial assets measured at FVOCI [Member]    
Disclosure Of Financial Assets [Line Items]    
Equity securities (unlisted) 452 5,409
Financial assets measured at FVTPL [Member]    
Disclosure Of Financial Assets [Line Items]    
Equity securities (unlisted) 3,412  
Other securities 68  
Financial Assets Measured at Amortised Cost [Member]    
Disclosure Of Financial Assets [Line Items]    
Other securities $ 99 $ 99