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Revenue (Tables)
12 Months Ended
Mar. 31, 2019
Text block [abstract]  
Summary of Revenue from Products and Services


     Year ended March 31,  
     2017      2018      2019  

Rendering of services

    522,061       524,543       571,301  

Sales of products

     28,341        20,328        14,544  
  

 

 

    

 

 

    

 

 

 
    550,402       544,871       585,845