v3.26.3
Segment and Geographic Information - Summary of Reconciliation of Segment Financial Information to Loss from Operations (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Segment Reporting [Line Items]        
Income from operations $ 1,084,845 $ 393,256 $ 2,750,847 $ 838,621
Total stock-based compensation expense 318,889 172,318 785,690 487,628
Reconciling items        
Segment Reporting [Line Items]        
Income from operations 1,084,845 393,256 2,750,847 838,621
Research and development expenses 154,506 109,142 413,262 315,172
General and administrative expenses 136,543 103,370 373,401 316,758
Total stock-based compensation expense 318,889 172,318 785,690 487,628
Operating Segments        
Segment Reporting [Line Items]        
Total Contribution $ 1,694,783 $ 778,086 $ 4,323,200 $ 1,958,179