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Debt - Narrative (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Feb. 11, 2025
USD ($)
Nov. 27, 2024
USD ($)
$ / shares
shares
Nov. 20, 2024
USD ($)
Nov. 04, 2024
USD ($)
tradingDay
$ / shares
shares
Jun. 07, 2024
USD ($)
day
$ / shares
shares
May 01, 2024
$ / shares
Feb. 28, 2025
USD ($)
agreement
$ / shares
shares
Aug. 31, 2024
USD ($)
agreement
Feb. 29, 2024
USD ($)
Feb. 28, 2025
USD ($)
agreement
$ / shares
shares
Feb. 29, 2024
USD ($)
May 31, 2024
USD ($)
agreement
Aug. 11, 2024
Jun. 17, 2024
Debt Instrument [Line Items]                            
Letters of credit             $ 38,300,000     $ 38,300,000        
Gain (loss) on change in fair value of debt             0   $ 0 (85,439,000) $ 0      
Conversion of debt to common stock                   104,945,000 0      
Loss on conversion of debt             0   $ 0 33,612,000 0      
Issuance of warrants, at fair value             $ 6,471,000     50,586,000 0      
Cashless exercise of warrants                   $ 5,000 0      
Number of SAFE agreements | agreement             2 2   2        
Proceeds from SAFE agreement               $ 12,000,000   $ 12,000,000   $ 12,000,000    
Discount percentage of safe agreement for future equity method investment                   90.00%        
Proceeds from convertible notes                   $ 450,000,000 0      
Stock repurchased during period, value       $ 31,300,000           31,342,000        
Payments for derivative instrument, financing activities                   52,736,000 0      
Stock repurchased and retired during period (in shares) | shares       4,300,000                    
Shares repurchased, cost per share (in dollars per share) | $ / shares       $ 7.36                    
Purchase of capped call options                   $ 51,750,000 $ 0      
Debt instrument, redemption price, percentage       100.00%                    
Interest maturity closing period 18 months                          
Discount percentage of capitalize interest expense                   100.00%        
CIM Warrants                            
Debt Instrument [Line Items]                            
Class of warrant or right warrants exercised for cash (in shares) | shares                   4,900,000        
Warrants and rights outstanding             $ 0     $ 0        
Prepaid Forward Repurchase                            
Debt Instrument [Line Items]                            
Payments for derivative instrument, financing activities       $ 52,700,000                    
Prepaid Forward Repurchase Transaction                            
Debt Instrument [Line Items]                            
Payments for derivative instrument, financing activities                   $ 52,700,000        
Derivative instrument (in shares) | shares             7,200,000     7,200,000        
Capped Call Transaction                            
Debt Instrument [Line Items]                            
Payments for derivative instrument, financing activities                   $ 51,800,000        
Cap call price             14.72     14.72        
CIM Warrants                            
Debt Instrument [Line Items]                            
Issuance of warrants, at fair value                   $ 36,500,000        
Initial Warrants | Measurement Input, Share Price                            
Debt Instrument [Line Items]                            
Measurement input                           4.36
Additional Warrants | Measurement Input, Share Price                            
Debt Instrument [Line Items]                            
Measurement input                         3.04  
Convertible Debt                            
Debt Instrument [Line Items]                            
Purchase of capped call options       51,800,000                    
Yorkville Convertible Debt | Convertible Debt                            
Debt Instrument [Line Items]                            
Number of prepaid advance agreements | agreement                       2    
Promissory note amount                       $ 92,100,000    
Gain (loss) on change in fair value of debt                   $ 4,100,000        
Number of shares to be issued (in shares) | shares             4,800,000     4,800,000        
Number of shares sold in transaction (in shares) | shares         100,000                  
Trading days floor price (in dollars per share) | $ / shares         $ 2.00 $ 3.00                
Weighted average stock price (in dollars per share) (less than) | $ / shares         $ 3.00                  
Trading days | day         5                  
Debt instrument, convertible, threshold consecutive trading days | day         7                  
Interest Rate             0.00%     0.00%        
Other long-term debt             $ 0     $ 0   80,243,000    
Yorkville Convertible Debt, Initial YA Notes | Convertible Debt                            
Debt Instrument [Line Items]                            
Conversion of debt to common stock                   $ 71,300,000        
Yorkville Convertible Debt, May PPA | Convertible Debt                            
Debt Instrument [Line Items]                            
Number of shares to be issued (in shares) | shares                   19,100,000        
Yorkville Convertible Debt, YA Notes | Convertible Debt                            
Debt Instrument [Line Items]                            
Sale of stock, commitment fee amount             $ 2,100,000     $ 2,100,000        
CIM Promissory Note                            
Debt Instrument [Line Items]                            
Extinguishment of debt, amount                   $ 9,400,000        
CIM Promissory Note | Promissory note                            
Debt Instrument [Line Items]                            
Promissory note amount         $ 125,000,000                  
Long-term debt         $ 125,000,000                  
CIM Promissory Note | Promissory note | CIM Warrants                            
Debt Instrument [Line Items]                            
Warrants outstanding (in shares) | shares             9,265,366     9,265,366        
Exercise price (in dollars per share) | $ / shares             $ 4.8005     $ 4.8005        
Warrant term             5 years     5 years        
CIM Promissory Note | Promissory note | Initial Warrants                            
Debt Instrument [Line Items]                            
Warrants outstanding (in shares) | shares             6,300,449     6,300,449        
CIM Promissory Note | Promissory note | Additional Warrants                            
Debt Instrument [Line Items]                            
Warrants outstanding (in shares) | shares             2,964,917     2,964,917        
Convertible Senior Notes Due 2030 | Convertible Debt                            
Debt Instrument [Line Items]                            
Promissory note amount       450,000,000                    
Interest Rate             2.75%     2.75%        
Proceeds from convertible notes       435,200,000                    
Stock repurchased during period, value       $ 84,000,000                    
Debt instrument, convertible, conversion ratio       0.1025431                    
Convertible Senior Notes Due 2030 | Convertible Debt | Debt Conversion Terms One                            
Debt Instrument [Line Items]                            
Trading days | tradingDay       20                    
Debt instrument, convertible, threshold consecutive trading days | tradingDay       30                    
Debt instrument, convertible, threshold percentage of stock price trigger       130.00%                    
Debt instrument, redemption price, percentage       100.00%                    
Convertible Senior Notes Due 2030 | Convertible Debt | Embedded Derivative Financial Instruments                            
Debt Instrument [Line Items]                            
Gain (loss) on change in fair value of debt     $ (103,000,000) $ 13,500,000     $ (89,600,000)              
Embedded derivative, fair value       149,900,000                    
Host financial instrument, fair value       $ 286,600,000                    
Derivative liability     $ 252,900,000                      
Senior Unsecured Convertible Notes | Convertible Debt                            
Debt Instrument [Line Items]                            
Interest Rate             2.75%     2.75%        
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares       $ 9.75                    
Other long-term debt             $ 450,000,000     $ 450,000,000   $ 0    
Macquarie Promissory Note                            
Debt Instrument [Line Items]                            
Gain (loss) on extinguishment of debt $ (11,800,000)                          
Macquarie Promissory Note | Construction in progress                            
Debt Instrument [Line Items]                            
Gain (loss) on extinguishment of debt $ (10,600,000)                          
Percentage of gain (loss) on extinguishment of debt 90.00%                          
Macquarie Promissory Note | Other Capitalized Property Plant and Equipment                            
Debt Instrument [Line Items]                            
Gain (loss) on extinguishment of debt $ (1,200,000)                          
Percentage of gain (loss) on extinguishment of debt 10.00%                          
Macquarie Promissory Note | Macquarie Warrants                            
Debt Instrument [Line Items]                            
Measurement input   7.38                        
Issuance of warrants, at fair value   $ 7,600,000                        
Macquarie Promissory Note | Promissory note                            
Debt Instrument [Line Items]                            
Promissory note amount   $ 150,000,000                        
Debt Instrument, covenant, prepayment prior to the date four months maturity   1.11                        
Debt Instrument, covenant, prepayment after to the date four months maturity   1.20                        
Debt instrument, covenant, prepayment after to the date seven months maturity   1.35                        
Repayment fee   1.35                        
Fair value, net liability   $ 16,500,000                        
Macquarie Promissory Note | Promissory note | Macquarie Warrants                            
Debt Instrument [Line Items]                            
Warrants outstanding (in shares) | shares   1,035,197                        
Exercise price (in dollars per share) | $ / shares   $ 9.66                        
Warrants or rights outstanding, exercisable period after issuance   6 months                        
SMBC Loan | Line of Credit                            
Debt Instrument [Line Items]                            
Other long-term debt $ 375,000,000                          
SMBC Loan | Line of Credit | Variable Rate, Closing Date Through Six Month Anniversary | Base Rate                            
Debt Instrument [Line Items]                            
Debt instrument, interest percentage 2.50%                          
SMBC Loan | Line of Credit | Variable Rate, Six Month Anniversary Through One Year Anniversary | Base Rate                            
Debt Instrument [Line Items]                            
Debt instrument, interest percentage 3.50%                          
SMBC Loan | Line of Credit | Variable Rate, After One Year Anniversary While SOFR Loans Bear Interest | Secured Overnight Financing Rate (SOFR)                            
Debt Instrument [Line Items]                            
Debt instrument, interest percentage 4.50%                          
SMBC Loan | Line of Credit | Variable Rate, After Six Month Anniversary | Secured Overnight Financing Rate (SOFR)                            
Debt Instrument [Line Items]                            
Debt instrument, interest percentage 3.50%                          
SMBC Loan | Line of Credit | Variable Rate, After Six Month Anniversary To One Year Anniversary | Secured Overnight Financing Rate (SOFR)                            
Debt Instrument [Line Items]                            
Debt instrument, interest percentage 4.50%                          
SMBC Loan | Line of Credit | Variable Rate, After One Year Anniversary | Secured Overnight Financing Rate (SOFR)                            
Debt Instrument [Line Items]                            
Debt instrument, interest percentage 5.50%