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Non-operating (expenses) / income, net
12 Months Ended
Mar. 31, 2020
Other Income and Expenses [Abstract]  
Non-operating (expenses) / income, net
  22 Non-operating (expenses) / income, net

Non-operating (expenses) / income, net comprises the following: 

    Year Ended March 31,
    2018   2019   2020
      $ in thousands       $ in thousands       $ in thousands  
Interest income     191       237       175  
Interest expense     (72 )     (139 )     (181 )
Foreign exchange (loss) / gain     (353 )     (21 )     42  
                         
Non-operating (expenses) / income, net     (234 )     77       36