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Property, Plant and Equipment, Net
 12 Months Ended
Mar. 31, 2021
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT, NET
8.PROPERTY, PLANT AND EQUIPMENT, NET

Property, plant and equipment, net consisted of the following:


   As of March 31, 
   2020   2021 
   $   $ 
At cost:          
Machinery and equipment   12,135    11,738 
Furniture and fixtures   90    91 
Leasehold improvements   1,120    1,114 
Motor vehicles   162    167 
Total   13,507    13,110 
Less: Accumulated depreciation and impairment   (12,629)   (12,277)
Property, plant and equipment, net   878    833 

Depreciation expense incurred for the years ended March 31, 2019, 2020 and 2021 were $261, $145 and $159, respectively.


Impairment of property, plant and equipment amounting to $233, $nil and $nil incurred during the years ended March 31, 2019, 2020 and 2021, respectively.