v3.26.1
Debt, net - Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Aug. 29, 2025
Aug. 28, 2025
Jul. 29, 2025
Jul. 31, 2025
Jun. 30, 2025
May 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 01, 2025
Debt Instrument [Line Items]                  
Conversion price amount             $ 282,176,000    
Short-term debt             148,986,000 $ 148,986,000  
Interest income, debt             4,384,000    
Interest expense, net of capitalized interest             $ 652,000    
Class A Units                  
Debt Instrument [Line Items]                  
Conversion shares issued of common stock (in shares) 30,572,796           117,787,762    
Seed Convertible Notes                  
Debt Instrument [Line Items]                  
Aggregate principal amount           $ 26,124,000      
Simple interest           15.00%      
Matured years           5 years      
Conversion price (in dollars per share)           $ 0.89      
Issuance of equity           $ 10,000,000      
Pre-money valuation amount           $ 1,000,000,000      
Converted shares (in shares)           30,572,796      
Series A Convertible Note                  
Debt Instrument [Line Items]                  
Aggregate principal amount       $ 16,600,000 $ 58,900,000        
Simple interest         15.00%        
Matured years         5 years        
Issuance of equity         $ 150,000,000        
Pre-money valuation amount         $ 1,000,000,000        
Converted shares (in shares)         58,437,945        
Series A Convertible Note | Class A Units                  
Debt Instrument [Line Items]                  
Conversion price (in dollars per share)         $ 1.33        
Series B Convertible Note | Firebird Equipment Holdco                  
Debt Instrument [Line Items]                  
Aggregate principal amount     $ 145,000,000            
Issuance of equity     150,000,000            
Pre-money valuation amount     $ 1,000,000,000            
Bearing interest rate     11.00%            
Subordinated senior bank debt     $ 150,000,000            
Initial recognition     $ 117,000,000            
Derecognition   $ 178,000,000              
Change in fair value   $ 61,000,000              
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]   Other income (expense), net              
Series B Convertible Note | Class A Units | Firebird Equipment Holdco                  
Debt Instrument [Line Items]                  
Converted shares (in shares)     28,777,021,000            
Conversion price amount     $ 3,000,000,000            
Percentage of outstanding principal amount     115.00%            
Percentage of unconverted portion of principal amount     15.00%            
Promissory Note                  
Debt Instrument [Line Items]                  
Accrued interest                 $ 224,000
Effective interest rates             4.50% 4.50%  
Promissory Note | Firebird Equipment Holdco                  
Debt Instrument [Line Items]                  
Aggregate principal amount     $ 20,000,000            
Bearing interest rate     4.50%            
First installment amount     $ 5,000,000            
Monthly installment amount     $ 2,500,000            
Macquarie Term Loan                  
Debt Instrument [Line Items]                  
Aggregate principal amount $ 148,986,000                
Bearing interest rate 1.00%                
Net of debt issuance costs $ 99,342,000                
Prepayment premium 1.50                
Prepayment premium period 150 days                
Percentage of outstanding accrued interest rate 1.50%                
Short-term debt             $ 109,799,000 $ 109,799,000  
Interest rate             1.00%    
Effective interest rates             48.90% 48.90%  
Accrued interest term loan               $ 16,302,000  
Macquarie Term Loan | Embedded Derivative in Macquarie Term Loan                  
Debt Instrument [Line Items]                  
Fair value of embedded derivative instrument             $ 5,500,000 5,500,000  
Embedded derivative, loss on embedded derivative             4,240,000    
Fair value of term loan             $ 145,899,000 $ 145,899,000