v3.26.1
Description of Business, Basis of Presentation (Narrative) (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Aug. 07, 2026
USD ($)
Item
Jun. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Debt Instrument [Line Items]                  
Current assets, net   $ 92,600       $ 92,600      
Net loss   (99,429) $ (318,590) $ (76,203) $ (96,198) (418,019) $ (172,401)    
Cash and cash equivalents   $ 97,686   $ 261,836   $ 97,686 $ 261,836 $ 173,032 $ 339,625
Subsequent Event [Member]                  
Debt Instrument [Line Items]                  
Number of concurrent offtake agreements | Item 2                
Concurrent offtake agreements, maximum advance prepayments amount $ 75,000