v3.25.4
Stockholders' equity - Schedule of Pre-funded Warrants (Details) - shares
Dec. 31, 2025
Mar. 31, 2025
Stock options, issued and outstanding    
Class of Warrant or Right [Line Items]    
Issuance of pre-funded warrants (in shares) 11,927,970 10,214,878
Restricted and performance stock units    
Class of Warrant or Right [Line Items]    
Issuance of pre-funded warrants (in shares) 5,663,023 3,611,774
Stock options and restricted stock units, future issuance    
Class of Warrant or Right [Line Items]    
Issuance of pre-funded warrants (in shares) 1,461,563 2,119,283
Employee stock purchase plan, available for future grants    
Class of Warrant or Right [Line Items]    
Issuance of pre-funded warrants (in shares) 4,102,399 3,405,175
Pre-IPO warrants to purchase common stock    
Class of Warrant or Right [Line Items]    
Issuance of pre-funded warrants (in shares) 0 497,344
Pre-funded warrants    
Class of Warrant or Right [Line Items]    
Issuance of pre-funded warrants (in shares) 14,058,153 14,058,153
Total shares of common stock reserved for future issuance    
Class of Warrant or Right [Line Items]    
Issuance of pre-funded warrants (in shares) 37,213,108 33,906,607