v3.26.1
Stock-based compensation - Stock option activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Number of Shares    
Outstanding at beginning of the period (in shares) 11,785,458  
Granted (in shares) 2,167,083  
Exercised (in shares) (118,075)  
Cancelled (in shares) (1,341,594)  
Outstanding at end of the period (in shares) 12,492,872 11,785,458
Options exercisable (in shares) 8,594,036  
Options vested and expected to vest (in shares) 12,492,872  
Weighted Average Exercise Price    
Outstanding at beginning of the period (in dollars per share) $ 14.12  
Granted (in dollars per share) 7.63  
Exercised (in dollars per share) 8.49  
Cancelled (in dollars per share) 14.53  
Outstanding at end of the period (in dollars per share) 13.00 $ 14.12
Options exercisable (in dollars per share) 14.99  
Options vested and expected to vest (in dollars per share) $ 13.00  
Weighted Average Contractual Term (Years)    
Outstanding (years) 5 years 8 months 15 days 5 years 7 months 17 days
Options exercisable (years) 4 years 2 months 23 days  
Options vested and expected to vest (years) 5 years 8 months 15 days  
Aggregate Intrinsic Value    
Outstanding $ 25,470 $ 4,323
Options exercisable 14,195  
Options vested and expected to vest $ 25,470