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Tax Assets and Liabilities - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Mar. 31, 2021
USD ($)
Bottom of Range [Member]  
Disclosure Of Components Of Deferred Tax Assets And Liabilities [Line Items]  
Tax loss expiration period 2022
Top of Range [Member]  
Disclosure Of Components Of Deferred Tax Assets And Liabilities [Line Items]  
Tax loss expiration period 2035
Singapore and Indonesia Entity [Member]  
Disclosure Of Components Of Deferred Tax Assets And Liabilities [Line Items]  
Tax losses carried forward for an indefinite period $ 3,027
Indian Subsidiaries [Member]  
Disclosure Of Components Of Deferred Tax Assets And Liabilities [Line Items]  
Unabsorbed depreciation carried forward for an indefinite period $ 30,609