v3.26.1
Income Taxes - Additional Information (Details) - USD ($)
3 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Operating Loss Carryforwards [Line Items]        
Decrease in valuation allowance $ 1,500,000,000      
Valuation allowance 15,119,000 $ 1,479,926,000    
Unrecognized tax benefits 93,012,000 79,248,000 $ 61,514,000 $ 51,850,000
Unrecognized tax benefits that would impact effective tax rate 86,700,000      
Accrued interest and penalties related to unrecognized tax benefits $ 0 0 $ 0  
Domestic Tax Authority        
Operating Loss Carryforwards [Line Items]        
Net operating loss carryforwards   3,200,000,000    
NOL carryforwards subject to annual utilization limitation   23,000,000.0    
Domestic Tax Authority | Research Tax Credit Carryforward        
Operating Loss Carryforwards [Line Items]        
Tax credit carryforwards   150,100,000    
State and local income taxes paid:        
Operating Loss Carryforwards [Line Items]        
Net operating loss carryforwards   4,600,000,000    
NOL carryforwards subject to annual utilization limitation   33,900,000    
State and local income taxes paid: | Research Tax Credit Carryforward        
Operating Loss Carryforwards [Line Items]        
Tax credit carryforwards   70,600,000    
Foreign income taxes paid: | U.K.        
Operating Loss Carryforwards [Line Items]        
Net operating loss carryforwards   $ 44,000,000.0