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Equity and Temporary Equity - Series A-3 and Series A-4 Shares Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Aug. 04, 2025
Jul. 01, 2021
Sep. 30, 2025
Jun. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Class of Stock [Line Items]                
Preferred stock dividends     $ 1.0   $ 0.3 $ 4.0 $ 0.9  
Accrued liabilities           22.3 (3.2)  
Increase in net loss attributable to common stockholders     9.4   $ 15.3 56.2 $ 18.9  
Series A-3 and A-4 Preferred Stock                
Class of Stock [Line Items]                
Dividends payable $ 0.5   $ 0.5 $ 0.7   $ 0.5    
Preferred stock cumulative cash dividend rate     7.50% 7.50%   7.50%    
Preferred stock dividend rate           4.00%    
Accreting dividend threshold rate     7.25% 7.25%   7.25%    
Dividend payable, additional amount accrued, for prior period 1       $ 1.3        
Dividend payable, additional amount accrued, for prior period 2       0.2        
Increase in accrued preferred stock       1.3        
Preferred stock dividends       1.3        
Accrued liabilities       0.1        
Increase in net loss attributable to common stockholders       $ 1.3        
Volume weighted average price threshold percentage           150.00%    
Preferred stock trading days to calculate volume weighted average price (at least)           20 days    
Preferred stock trading days to calculate volume weighted average price, trading day period           30 days    
Consent rights percentage (at least)           75.00%    
Series A-3 and A-4 Preferred Stock | Maximum                
Class of Stock [Line Items]                
Preferred stock dividend rate           2.00%    
Series A-3 and A-4 Preferred Stock | Minimum                
Class of Stock [Line Items]                
Preferred stock dividend rate           0.00%    
Series A-3 Preferred Stock                
Class of Stock [Line Items]                
Accrued value per share (in usd per share)           $ 1,000    
Number of shares to be issued upon conversion of preferred stock (in shares)     294,062     294,062   259,212
Series A-3 Preferred Stock | Private Placement                
Class of Stock [Line Items]                
Preferred stock conversion price (in usd per share)           $ 23.63    
Series A-4 Preferred Stock                
Class of Stock [Line Items]                
Accrued value per share (in usd per share)           $ 1,000    
Number of shares to be issued upon conversion of preferred stock (in shares)     63,889     63,889   290,672
Series A-4 Preferred Stock | Private Placement                
Class of Stock [Line Items]                
Preferred stock conversion price (in usd per share)           $ 34.40    
CGIC | CGIC Promissory Note | Secured Debt | Non-Operating Corporate                
Class of Stock [Line Items]                
Shares exchanged for additional principal amount 8,063              
CGIC | Series A shares issued and outstanding                
Class of Stock [Line Items]                
Issuance of common stock (in shares)   6,125            
CGIC | Series A-2 shares issued and outstanding                
Class of Stock [Line Items]                
Issuance of common stock (in shares)   10,000            
CGIC | Series A-3 and A-4 Preferred Stock                
Class of Stock [Line Items]                
Redemption value   $ 9.1            
Preferred stock value outstanding     $ 9.3     $ 9.3    
Dividends payable     $ 0.2     $ 0.2    
CGIC | Series A-3 and A-4 Preferred Stock | CGIC Promissory Note | Secured Debt | Non-Operating Corporate                
Class of Stock [Line Items]                
Dividends payable $ 0.5