v3.25.4
EQUITY - Series of Convertible Preferred Stock (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Sep. 30, 2025
Class of Stock [Line Items]      
Number of Shares Outstanding (in shares) 111,900,495 104,575,110 0
Liquidation Preference $ 528,566,000 $ 455,274,801  
Preferred stock convertible, at then effective conversion rate upon a qualifying IPO, aggregate gross proceeds (greater than) $ 50,000,000 $ 50,000,000  
Series Seed      
Class of Stock [Line Items]      
Number of Shares Outstanding (in shares) 16,100,540 16,100,540  
Liquidation Preference $ 16,947,000 $ 16,947,000  
Liquidation Price (in dollars per share) $ 1.05    
Dividend Rate (in dollars per share) 0.08    
Conversion Price (in dollars per share) $ 1.05    
Series A      
Class of Stock [Line Items]      
Number of Shares Outstanding (in shares) 32,860,461 32,860,461  
Liquidation Preference $ 41,759,000 $ 41,759,000  
Liquidation Price (in dollars per share) $ 1.27    
Dividend Rate (in dollars per share) 0.10    
Conversion Price (in dollars per share) $ 1.27    
Series B      
Class of Stock [Line Items]      
Number of Shares Outstanding (in shares) 29,448,787 29,448,787  
Liquidation Preference $ 73,519,000 $ 73,519,000  
Liquidation Price (in dollars per share) $ 2.50    
Dividend Rate (in dollars per share) 0.20    
Conversion Price (in dollars per share) $ 2.50    
Series C      
Class of Stock [Line Items]      
Number of Shares Outstanding (in shares) 11,238,629 11,238,629  
Liquidation Preference $ 85,000,000 $ 85,000,000  
Liquidation Price (in dollars per share) $ 7.56    
Dividend Rate (in dollars per share) 0.61    
Conversion Price (in dollars per share) $ 7.56    
Series C-1      
Class of Stock [Line Items]      
Number of Shares Outstanding (in shares) 504,081 504,081  
Liquidation Preference $ 3,050,000 $ 3,050,000  
Liquidation Price (in dollars per share) $ 6.05    
Dividend Rate (in dollars per share) 0.48    
Conversion Price (in dollars per share) $ 6.05    
Series C-2      
Class of Stock [Line Items]      
Number of Shares Outstanding (in shares) 1,983,287 1,983,287  
Liquidation Preference $ 15,000,000 $ 15,000,000  
Liquidation Price (in dollars per share) $ 7.56    
Dividend Rate (in dollars per share) 0.61    
Conversion Price (in dollars per share) $ 7.56    
Series D      
Class of Stock [Line Items]      
Number of Shares Outstanding (in shares) 12,439,325 12,439,325  
Liquidation Preference $ 219,999,000 $ 219,999,000  
Liquidation Price (in dollars per share) $ 17.69    
Dividend Rate (in dollars per share) 1.41    
Conversion Price (in dollars per share) $ 17.69    
Series E      
Class of Stock [Line Items]      
Number of Shares Outstanding (in shares) 7,325,385    
Liquidation Preference $ 73,292,000    
Liquidation Price (in dollars per share) $ 10.01    
Dividend Rate (in dollars per share) 0.80    
Conversion Price (in dollars per share) $ 10.01    
Convertible Preferred Stock      
Class of Stock [Line Items]      
Number of Shares Outstanding (in shares) 111,900,495 104,575,110 0
Liquidation Preference $ 528,566,000 $ 455,275,000