v3.26.1
Liquidity and Capital Resources and Going Concern (Details)
 1 Months Ended 3 Months Ended 6 Months Ended
Jul. 24, 2026
Jul. 23, 2026
May 15, 2026
USD ($)
Apr. 17, 2026
USD ($)
Aug. 13, 2026
USD ($)
shares
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
$ / shares
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Sep. 26, 2023
USD ($)
Debt Instrument [Line Items]                      
Accumulated deficit           $ (4,779,927,000)   $ (4,779,927,000)   $ (4,705,042,000)  
Cash and cash equivalents           11,196,000 $ 13,228,000 11,196,000 $ 13,228,000 $ 34,927,000  
Restricted cash, current           12,500,000   12,500,000      
Working capital deficit           (83,800,000)   (83,800,000)      
Net loss           36,029,000 $ 124,676,000 74,885,000 $ 134,954,000    
Subsequent Event                      
Debt Instrument [Line Items]                      
Stockholder's equity, stock split, conversion ratio 0.0066 0.006666667                  
At The Market Offering Program                      
Debt Instrument [Line Items]                      
Shelf registration statement, maximum authorized amount           300,000,000.0   300,000,000.0      
At The Market Offering Program | Subsequent Event                      
Debt Instrument [Line Items]                      
Number of shares issued in transaction (in shares) | shares         163,174            
Gross proceeds         $ 1,000,000.0            
Class A Common Stock | Subsequent Event                      
Debt Instrument [Line Items]                      
Stockholder's equity, stock split, conversion ratio 0.00666667                    
Class A Common Stock | At The Market Offering Program                      
Debt Instrument [Line Items]                      
Stockholders equity note at the market offering amount           90,000,000.0   $ 90,000,000.0      
Closing bid price (in dollars per share) | $ / shares               $ 0.10      
Closing bid price, consecutive trading days               10 days      
May 2026 Convertible Notes                      
Debt Instrument [Line Items]                      
Aggregate principal amount     $ 25,000,000.0                
Original principal balance     27,000,000.0                
Funded     25,000,000.0                
Proceeds from issuance of debt     $ 42,500,000                
SPA Notes | Committed Debt                      
Debt Instrument [Line Items]                      
Aggregate principal amount           635,100,000   $ 635,100,000      
Funded           591,800,000   591,800,000      
To be funded           43,300,000   43,300,000      
Outstanding amount           107,100,000   107,100,000      
SPA Notes | Optional Debt                      
Debt Instrument [Line Items]                      
Aggregate principal amount           139,500,000   139,500,000      
Funded           106,000,000.0   106,000,000.0      
To be funded           33,500,000   33,500,000      
Outstanding amount           4,800,000   4,800,000      
Streeterville Capital, LLC                      
Debt Instrument [Line Items]                      
Proceeds from issuance of debt       $ 45,000,000.0              
Streeterville Capital, LLC | Secured Streeterville Notes                      
Debt Instrument [Line Items]                      
Aggregate principal amount       45,000,000.0              
Original principal balance       $ 45,800,000              
Sales Agents | Class A Common Stock | Sales Agreement                      
Debt Instrument [Line Items]                      
Commitment amount                     $ 90,000,000.0
Accumulated Deficit                      
Debt Instrument [Line Items]                      
Working capital deficit           $ 96,300,000   96,300,000      
Net loss               $ 81,300,000