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Government assistance (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Disclosure of government grants [Line Items]    
Total government assistance $ 4,482 $ 4,739
Direct cost of revenues    
Disclosure of government grants [Line Items]    
Total government assistance 653 1,144
General and administrative    
Disclosure of government grants [Line Items]    
Total government assistance 681 545
Research and development    
Disclosure of government grants [Line Items]    
Total government assistance 3,006 2,692
Sales and marketing    
Disclosure of government grants [Line Items]    
Total government assistance $ 142 $ 358