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Loans and Borrowings - Summary of Long-term Loans and Borrowings (Detail) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Jan. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Disclosure of detailed information about borrowings [line items]      
Total long term debt   $ 89,900 $ 118,000
Unamortised debt issuance cost   769 1,257
Total long term debt   89,131 116,743
Current portion of long term debt   27,740 27,613
Long term debt   $ 61,391 89,130
Long term loan to finance acquisition of denali [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate basis 3M USD Libor 3M USD Libor  
Adjustment to interest rate basis 1.27% 1.27%  
Final maturity (fiscal year)   2020  
Total long term debt   $ 22,700 34,000
Long term loan to finance acquisition of health help [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate basis   3M USD Libor  
Adjustment to interest rate basis   0.95%  
Final maturity (fiscal year)   2022  
Total long term debt   $ 67,200 $ 84,000