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Accrued Expenses and Other Current Liabilities (Tables)
 12 Months Ended
Mar. 31, 2019
Accrued Liabilities Current and Other Liabilities Current [Abstract]  
Schedule of accrued expenses and other current liabilities

   As of March 31, 
   2018   2019 
   $   $ 
         
Accrued payroll   620    822 
Accrued housing allowance   548    294 
Accrued other social benefit   1,792    1,087 
Deposits received from customers   17    25 
Unbilled purchases from suppliers   238    35 
Accrued audit fee   257    251 
Others   510    475 
    3,982    2,989