v3.25.4
Warrants, Redeemable Convertible Preferred Stock and Stockholders' Equity - Additional Information (Details) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2025
Sep. 30, 2025
Sep. 30, 2025
Dec. 31, 2024
Dec. 31, 2023
Class of Stock [Line Items]          
Number of shares authorized for issuance   500,000,000 500,000,000 500,000,000 500,000,000
Common stock, par value   $ 0.000001 $ 0.000001 $ 0.000001 $ 0.000001
Common stock, voting rights     one vote per share    
Common stock, capital shares reserved for conversion, exercise or issuance   4,831,124 4,831,124 16,152,751  
Conversion of redeemable convertible preferred stock to common stock on initial public offering, Shares 12,729,240     12,729,349  
Preferred shares issued   10,000,000 10,000,000    
Preferred stock outstanding   0 0    
Preferred stock, par value   $ 0.000001 $ 0.000001    
Temporary Equity, Par or Stated Value Per Share       $ 0.000001  
Preferred Stock, Dividend Rate, Percentage       8.00%  
Common Warrants          
Class of Stock [Line Items]          
Stock Option, Exercise Price, Decrease       $ 6.44  
Stock Option, Exercise Price, Increase       $ 31.08  
Non current liabilities warrants       $ 0 $ 100,000
Preferred Warrants          
Class of Stock [Line Items]          
Non current liabilities warrants       $ 100,000 200,000
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants         $ 437,319,000
Class of Warrant or Right, Exercise Price of Warrants or Rights         $ 0.55
Proceeds from Issuance of Warrants         $ 200,000
Common Stock          
Class of Stock [Line Items]          
Number of shares authorized for issuance       500,000,000  
Common stock, par value       $ 0.000001  
Number of shares, issued   4,600,000 4,600,000    
Conversion of redeemable convertible preferred stock to common stock on initial public offering, Shares   12,729,240 12,729,240    
Initial Public Offering          
Class of Stock [Line Items]          
Common stock, par value $ 0.000001        
Number of shares, issued 4,600,000        
Offering price of stock $ 24        
Conversion of redeemable convertible preferred stock to common stock on initial public offering, Shares 12,729,240        
Warrant liability settlement     $ 200,000    
Payments of Stock Issuance Costs $ 7,700,000        
Series Seed Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Convertible, Conversion Price       0.5  
Series A And Series B Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Convertible, Conversion Price       0.55  
Series C Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Convertible, Conversion Price       0.59  
Series C Preferred Stock | Preferred Warrants          
Class of Stock [Line Items]          
Preferred Stock, Convertible, Conversion Price       0.59  
Series D Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Convertible, Conversion Price       0.88  
Series E Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Convertible, Conversion Price       1.03  
Auction Market Preferred Securities, Stock Series, Par Value Per Share       1 $ 1.02
Series F Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Convertible, Conversion Price       1.83  
Auction Market Preferred Securities, Stock Series, Par Value Per Share       1.61 1.74
Series F 1 Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Convertible, Conversion Price       2.09  
Auction Market Preferred Securities, Stock Series, Par Value Per Share       $ 1.81 $ 1.97
Series G Preferred Shares          
Class of Stock [Line Items]          
Temporary Equity, Shares Issued       64,257,179 34,972,704
Temporary Equity, Par or Stated Value Per Share       $ 0.9 $ 0.9
Proceeds from Issuance of Redeemable Convertible Preferred Stock       $ 58,100,000 $ 31,600
Payments of Stock Issuance Costs       $ 100,000 $ 300
Preferred Stock, Convertible, Conversion Price       $ 0.9