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Significant accounting policies (Details)
12 Months Ended
Mar. 31, 2022
Acquired software technologies | Bottom of range  
Disclosure significant accounting policies and related changes in the current reporting period [line items]  
Useful life measured as period of time, intangible assets other than goodwill 3 years
Acquired software technologies | Top of range  
Disclosure significant accounting policies and related changes in the current reporting period [line items]  
Useful life measured as period of time, intangible assets other than goodwill 5 years
Customer relationships | Bottom of range  
Disclosure significant accounting policies and related changes in the current reporting period [line items]  
Useful life measured as period of time, intangible assets other than goodwill 3 years
Customer relationships | Top of range  
Disclosure significant accounting policies and related changes in the current reporting period [line items]  
Useful life measured as period of time, intangible assets other than goodwill 6 years
Furniture  
Disclosure significant accounting policies and related changes in the current reporting period [line items]  
Useful life measured as period of time, property, plant and equipment 5 years
Equipment  
Disclosure significant accounting policies and related changes in the current reporting period [line items]  
Useful life measured as period of time, property, plant and equipment 5 years
Computer equipment  
Disclosure significant accounting policies and related changes in the current reporting period [line items]  
Useful life measured as period of time, property, plant and equipment 3 years