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Prepaid Expenses and Other Current Assets (Tables)
 12 Months Ended
Mar. 31, 2023
Prepaid Expenses And Other Current Assets Disclosure Abstract  
Schedule of prepaid expenses and other current assets
   As of March 31, 
   2022   2023 
   $   $ 
         
Prepaid expenses   145    141 
Payment in advance   154    164 
Deposits   295    54 
Other   26    47 
    620    406