v3.26.1
CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK - Summary of Shares Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Class of Stock [Line Items]        
Convertible preferred stock, par value (in dollars per share) $ 0.01 $ 0.01    
Convertible preferred stock, authorized (in shares) 444,760,848 444,760,848    
Convertible preferred stock, issued (in shares) 261,227,694 209,613,570    
Convertible preferred stock, outstanding (in shares) 261,227,694 209,613,570    
Liquidation Preference, Outstanding Shares $ 414,019 $ 370,456    
Convertible Preferred Stock Held by Consolidated VIE        
Class of Stock [Line Items]        
Convertible preferred stock, outstanding (in shares) (51,247,915) (51,247,915) (51,247,915) (51,247,915)
Series A        
Class of Stock [Line Items]        
Convertible preferred stock, par value (in dollars per share) $ 0.01      
Convertible preferred stock, authorized (in shares) 68,558,220      
Convertible preferred stock, issued (in shares) 66,428,185      
Convertible preferred stock, outstanding (in shares) 66,428,185      
Liquidation Preference, Outstanding Shares $ 19,160      
Series A | Convertible Preferred Stock Held by Consolidated VIE        
Class of Stock [Line Items]        
Convertible preferred stock, issued (in shares) 34,670,420      
Convertible preferred stock, outstanding (in shares) 34,670,420      
Series A-1        
Class of Stock [Line Items]        
Convertible preferred stock, par value (in dollars per share) $ 0.01      
Convertible preferred stock, authorized (in shares) 24,760,915      
Convertible preferred stock, issued (in shares) 22,515,315      
Convertible preferred stock, outstanding (in shares) 22,515,315      
Liquidation Preference, Outstanding Shares $ 45,031      
Series B        
Class of Stock [Line Items]        
Convertible preferred stock, par value (in dollars per share) $ 0.01      
Convertible preferred stock, authorized (in shares) 35,775,880      
Convertible preferred stock, issued (in shares) 35,127,160      
Convertible preferred stock, outstanding (in shares) 35,127,160      
Liquidation Preference, Outstanding Shares $ 21,190      
Series B | Convertible Preferred Stock Held by Consolidated VIE        
Class of Stock [Line Items]        
Convertible preferred stock, issued (in shares) 16,577,495      
Convertible preferred stock, outstanding (in shares) 16,577,495      
Series C        
Class of Stock [Line Items]        
Convertible preferred stock, par value (in dollars per share) $ 0.01      
Convertible preferred stock, authorized (in shares) 24,404,770      
Convertible preferred stock, issued (in shares) 24,404,770      
Convertible preferred stock, outstanding (in shares) 24,404,770      
Liquidation Preference, Outstanding Shares $ 70,075      
Series D        
Class of Stock [Line Items]        
Convertible preferred stock, par value (in dollars per share) $ 0.01      
Convertible preferred stock, authorized (in shares) 23,888,640      
Convertible preferred stock, issued (in shares) 23,888,640      
Convertible preferred stock, outstanding (in shares) 23,888,640      
Liquidation Preference, Outstanding Shares $ 165,000      
Series E-1        
Class of Stock [Line Items]        
Convertible preferred stock, par value (in dollars per share) $ 0.01      
Convertible preferred stock, authorized (in shares) 35,544,141      
Convertible preferred stock, issued (in shares) 0      
Convertible preferred stock, outstanding (in shares) 0      
Liquidation Preference, Outstanding Shares $ 0      
Series E-2        
Class of Stock [Line Items]        
Convertible preferred stock, par value (in dollars per share) $ 0.01      
Convertible preferred stock, authorized (in shares) 16,858,078      
Convertible preferred stock, issued (in shares) 0      
Convertible preferred stock, outstanding (in shares) 0      
Liquidation Preference, Outstanding Shares $ 0      
Series F        
Class of Stock [Line Items]        
Convertible preferred stock, par value (in dollars per share) $ 0.01      
Convertible preferred stock, authorized (in shares) 177,720,707      
Convertible preferred stock, issued (in shares) 51,614,127      
Convertible preferred stock, outstanding (in shares) 51,614,127      
Liquidation Preference, Outstanding Shares $ 43,563      
Series G        
Class of Stock [Line Items]        
Convertible preferred stock, par value (in dollars per share) $ 0.01      
Convertible preferred stock, authorized (in shares) 37,249,497      
Convertible preferred stock, issued (in shares) 37,249,497      
Convertible preferred stock, outstanding (in shares) 37,249,497      
Liquidation Preference, Outstanding Shares $ 50,000