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Stock-based compensation - Additional Information (Details)
$ in Millions
6 Months Ended
Sep. 30, 2024
USD ($)
Service-based vesting options  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized stock-based compensation cost $ 0.1
Unrecognized stock-based compensation cost, expected weighted-average period of recognition 1 year
Restricted stock and RSUs  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized stock-based compensation cost $ 109.0
Unrecognized stock-based compensation cost, expected weighted-average period of recognition 1 year 9 months 18 days