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Inventories, Net (Tables)
12 Months Ended
Mar. 31, 2023
Inventories, Net [Abstract]  
Schedule of inventories
   As of March 31, 
   2022   2023 
   $   $ 
         
Raw materials   1,578    1,043 
Work in progress   417    149 
Finished goods   355    221 
    2,350    1,413