v3.26.1
Stock-based compensation - Stock option activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Number of Shares    
Outstanding at beginning of the period (in shares) 10,214,878  
Granted (in shares) 2,201,239  
Exercised (in shares) (111,218)  
Cancelled (in shares) (519,441)  
Outstanding at end of the period (in shares) 11,785,458 10,214,878
Options exercisable (in shares) 8,222,796  
Options vested and expected to vest (in shares) 11,785,458  
Weighted Average Exercise Price    
Outstanding at beginning of the period (in dollars per share) $ 15.22  
Granted (in dollars per share) 8.41  
Exercised (in dollars per share) 3.43  
Cancelled (in dollars per share) 13.97  
Outstanding at end of the period (in dollars per share) 14.12 $ 15.22
Options exercisable (in dollars per share) 16.01  
Options vested and expected to vest (in dollars per share) $ 14.12  
Weighted Average Contractual Term (Years)    
Outstanding (years) 5 years 7 months 17 days 6 years 2 months 26 days
Options exercisable (years) 4 years 4 months 24 days  
Options vested and expected to vest (years) 5 years 7 months 17 days  
Aggregate Intrinsic Value    
Outstanding $ 4,323 $ 10,652
Options exercisable 4,282  
Options vested and expected to vest $ 4,323