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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' DEFICIT - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid in Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Beginning balances (in shares) at Dec. 31, 2023   199,133,827      
Beginning balance at Dec. 31, 2023 $ (110,800) $ 21 $ 765,018 $ 7 $ (875,846)
Increase (decrease) in stockholders' equity [Roll Forward]          
Stock-based compensation 18,533   18,533    
Exercise of warrants (in shares)   4,682,767      
Exercise of warrants $ 16,590   16,590    
Exercise of stock options (in shares) 44,000 44,000      
Exercise of stock options $ 56   56    
Release of restricted stock units (in shares)   2,052,963      
Cancellation of shares used to settle payroll tax withholding (in shares)   (749,875)      
Cancellation of shares used to settle payroll tax withholding (1,228)   (1,228)    
Issuance of common stock (in shares)   16,627,523      
Issuance of common stock 14,089 $ 2 14,087    
Remeasurement of Preferred Stock - related party (278,330)   (278,330)    
Foreign currency translation adjustment (13)     (13)  
Change in fair value of debt - credit risk - related party (43,490)     (43,490)  
Net loss $ (685,870)       (685,870)
Ending balances (in shares) at Dec. 31, 2024 221,791,205 221,791,205      
Ending balance at Dec. 31, 2024 $ (1,070,463) $ 23 534,726 (43,496) (1,561,716)
Increase (decrease) in stockholders' equity [Roll Forward]          
Stock-based compensation 23,881   23,881    
Exercise of warrants (in shares)   24,760,252      
Exercise of warrants $ 264,816   264,814    
Exercise of stock options (in shares) 938,628 938,628      
Exercise of stock options $ 2,522   2,522    
Release of restricted stock units (in shares)   12,864,479      
Cancellation of shares used to settle payroll tax withholding (in shares)   (82,438)      
Cancellation of shares used to settle payroll tax withholding (488)   (488)    
Issuance of common stock (in shares)   76,860,248      
Issuance of common stock 687,071 $ 7 687,064    
Remeasurement of Preferred Stock - related party (770,661)   (770,661)    
Repurchase of May 2025 Convertible Notes (325,886)   (325,886)    
Issuance of DOE Warrants 7,294   7,294    
Foreign currency translation adjustment 16     16  
Change in fair value of debt - credit risk - related party (87,317)     (87,317)  
Down round deemed dividend     4,456   (4,456)
Net loss $ (969,647)       (969,647)
Ending balances (in shares) at Dec. 31, 2025 337,132,374 337,132,374      
Ending balance at Dec. 31, 2025 $ (2,238,862) $ 32 $ 427,722 $ (130,797) $ (2,535,819)