v3.26.1
Summary of Significant Accounting Policies - Schedule of Significant Segment Expenses (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting Information [Line Items]        
Stock-based compensation expense $ 67,000 $ 28,830 $ 154,299 $ 53,914
Amortization of intangible assets 0 300 0 500
Total research and development expense 394,919 224,134 738,889 429,883
Operating Segments        
Segment Reporting Information [Line Items]        
Third-party research and development expenses 232,942 144,138 441,438 276,881
Salaries and other employee-related expenses 78,627 41,170 140,159 78,364
Stock-based compensation expense 39,311 19,126 83,949 35,505
Amortization of intangible assets 0 267 0 534
Other research and development costs 44,039 19,433 73,343 38,599
Total research and development expense 394,919 $ 224,134 738,889 $ 429,883
Increase (decrease) in third-party research and development expenses 88,804   164,557  
Increase (decrease) in salaries and other employee-related expenses 37,457   61,795  
Increase (decrease) in stock-based compensation expense 20,185   48,444  
Increase (decrease) in amortization of intangible assets (267)   (534)  
Increase (decrease) in other research and development costs 24,606   34,744  
Increase (decrease) in total research and development expense $ 170,785   $ 309,006