v3.26.3
Certain Balance Sheet Components - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Mar. 31, 2026
Research and Development Arrangement, Contract to Perform for Others [Line Items]          
Accumulated accrual contractual costs $ 42,500   $ 42,500   $ 42,500
Accrued compensation-related expenses 22,900   22,900    
Research and development expenses $ 145,747 $ 164,568 347,763 $ 317,487  
Moderna          
Research and Development Arrangement, Contract to Perform for Others [Line Items]          
General and administrative expenses     18,800    
Research and development expenses     $ 4,100