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Loans and Borrowings - Schedule of Terms and Conditions of Outstanding Loans, Lease Liabilities and Convertible Notes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Lease Liabilities [Member]    
Disclosure Of Loans And Borrowings [Line Items]    
Year of maturity 2020 - 2028 2020 - 2028
Original value $ 33,118 $ 41,432
Carrying amount $ 15,646 $ 24,553
Lease Liabilities [Member] | Bottom of Range [Member]    
Disclosure Of Loans And Borrowings [Line Items]    
Interest rate 10.00% 10.00%
Lease Liabilities [Member] | Top of Range [Member]    
Disclosure Of Loans And Borrowings [Line Items]    
Interest rate 11.00% 11.00%
INR 1 [Member] | Secured bank loans [Member]    
Disclosure Of Loans And Borrowings [Line Items]    
Year of maturity 2020 - 2026 2020 - 2026
Original value $ 1,288 $ 1,471
Carrying amount $ 735 $ 1,031
INR 1 [Member] | Secured bank loans [Member] | Bottom of Range [Member]    
Disclosure Of Loans And Borrowings [Line Items]    
Interest rate 7.00% 7.00%
INR 1 [Member] | Secured bank loans [Member] | Top of Range [Member]    
Disclosure Of Loans And Borrowings [Line Items]    
Interest rate 11.00% 11.00%
USD [Member] | Convertible notes [Member]    
Disclosure Of Loans And Borrowings [Line Items]    
Interest rate 7.39%  
Year of maturity 2024  
Original value $ 230,000  
Carrying amount $ 187,574