v3.26.1
NET LOSS PER SHARE - Schedule of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Earnings Per Share [Abstract]    
Net loss $ (1,028,344) $ (366,171)
Accretion of redeemable convertible preferred stock (related party) (105,962) (364,925)
Net loss attributable to common stockholders, basic (1,134,306) (731,096)
Net loss attributable to common stockholders, diluted $ (1,134,306) $ (731,096)
Weighted-average shares outstanding, basic (in shares) [1] 328,285,861 303,631,731
Weighted-average shares outstanding, diluted (in shares) [1] 328,285,861 303,631,731
Net loss per share attributable to common stockholders, basic (in dollars per share) [1] $ (3.46) $ (2.41)
Net loss per share attributable to common stockholders, diluted (in dollars per share) [1] $ (3.46) $ (2.41)
[1] The weighted-average shares outstanding attributable to common stockholders and net loss per share attributable to common stockholders have been adjusted for the prior periods presented to reflect the one-for-ten (1:10) reverse stock split effected on August 29, 2025. See Note 2 “Summary of Significant Accounting Policies” for more information.