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Consolidated Statements of Changes in Convertible Preferred Stock and Stockholders’ Equity (Deficit) - USD ($)
$ in Thousands
Total
Series A Preferred Stock
Series B Preferred Stock
Private Placement One
Private Placement Two
Preferred Stock
Series A Preferred Stock
Preferred Stock
Series B Preferred Stock
Common stock
Common stock
Series A Preferred Stock
Common stock
Series B Preferred Stock
Additional Paid-in Capital
Additional Paid-in Capital
Series A Preferred Stock
Additional Paid-in Capital
Series B Preferred Stock
Accumulated Deficit
Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2022 0                            
Beginning balance at Dec. 31, 2022 $ 0                            
Increase (Decrease) in Temporary Equity [Roll Forward]                              
Issuance of Series A preferred stock forward in connection with private placement and settlement of related forward contract (in shares)       619.627 49,570.162                    
Issuance of Series A Preferred Stock in connection with the Merger and settlement of related forward contract       $ 250 $ 34,848                    
Issuance of Series A preferred stock in connection with the merger and settlement of related forward contract (in shares) 384,930.724                            
Issuance of Series A Preferred Stock in connection with the Merger and settlement of related forward contract $ 261,753                            
Ending balance (in shares) at Dec. 31, 2023 435,120.513                            
Ending balance at Dec. 31, 2023 $ 296,851                            
Beginning balance at Dec. 31, 2022 0                            
Increase (Decrease) In Temporary Equity, Option, Roll Forward [Roll Forward]                              
Issuance of replacement options in Merger 3,643                            
Stock-based compensation expense 60                            
Ending balance at Dec. 31, 2023 3,703                            
Preferred stock, beginning balance (in shares) at Dec. 31, 2022           0 0                
Beginning balance at Dec. 31, 2022 93,828         $ 0 $ 0 $ 1     $ 493,322     $ (394,937) $ (4,558)
Common stock, beginning balance (in shares) at Dec. 31, 2022               5,101,459              
Increase (Decrease) in Stockholders' Equity                              
Issuance of common stock under employee stock purchase plan (in shares)               6,171              
Issuance of common stock under Employee Stock Purchase Plan $ 231                   231        
Issuance of common stock upon exercise of options (in shares) 0                            
Issuance of vested restricted stock units (in shares)               21,226              
Issuance of common stock forward in connection with the Merger $ 2,713                   2,713        
Issuance of common stock in connection with the merger and settlement of related forward contract (in shares)               224,099              
Issuance of replacement options in Merger 6,801                   6,801        
Issuance of common stock, license agreement (in shares)               44,642              
Issuance of common stock, license agreement 1,500                   1,500        
Settlement of outstanding equity awards at Merger (6,169)                   (6,169)        
Distribution of contingent value rights (340,300)                   (340,300)        
Stock-based compensation expense 20,964                   20,964        
Currency translation adjustment (53)                           (53)
Unrealized gain on marketable securities 11                           11
Net income (loss) $ (219,710)                         (219,710)  
Preferred stock, ending balance (in shares) at Dec. 31, 2023 0 0 0     0 0                
Ending balance at Dec. 31, 2023 $ (440,184)         $ 0 $ 0 $ 1     179,062     (614,647) (4,600)
Common stock, ending balance (in shares) at Dec. 31, 2023 5,397,597             5,397,597              
Increase (Decrease) in Temporary Equity [Roll Forward]                              
Issuance of Series A preferred stock forward in connection with private placement and settlement of related forward contract (in shares) 99,140.326                            
Issuance of Series A Preferred Stock in connection with the Merger and settlement of related forward contract $ 75,197                            
Transfer of Series A preferred stock and options for Series A preferred stock to permanent equity (in shares) (534,260.839)                            
Transfer of Series A Preferred Stock and options for Series A Preferred Stock to permanent equity $ (372,048)                            
Ending balance (in shares) at Dec. 31, 2024 0                            
Ending balance at Dec. 31, 2024 $ 0                            
Increase (Decrease) In Temporary Equity, Option, Roll Forward [Roll Forward]                              
Transfer of Series A Preferred Stock and options for Series A Preferred Stock to permanent equity (3,703)                            
Ending balance at Dec. 31, 2024 0                            
Increase (Decrease) in Stockholders' Equity                              
Transfer of Series A preferred stock and options for Series A preferred stock to permanent equity (in shares)           534,260.839                  
Transfer of Series A Preferred Stock and options for Series A Preferred Stock to permanent equity 375,751                   $ 375,751        
Conversion of Series A and Series B preferred stock to common stock (in shares)           (413,470.437) (2,499,976)   13,782,324 2,499,976          
Conversion of Series A Preferred Stock to common stock   $ 0             $ 2     $ (2)      
Issuance of Series B preferred stock and common stock in connection with private placement, net (in shares)             2,937,903     3,563,247          
Issuance of Series B Preferred Stock and common stock in connection with private placement, net of issuance costs of $5,585     $ 124,438                   $ 124,438    
Issuance of common stock upon exercise of options (in shares)               458,544     1,179,000        
Issuance of common stock upon exercise of options 1,179                            
Issuance of common stock upon exercise of common warrants (in shares)               65,681              
Issuance of common stock upon exercise of warrants 2,877                   $ 2,877        
Stock-based compensation expense 6,582                   6,582        
Currency translation adjustment (21)                           (21)
Unrealized gain on marketable securities 0                            
Net income (loss) $ (77,424)                         (77,424)  
Preferred stock, ending balance (in shares) at Dec. 31, 2024 0 120,790.402 437,927     120,790.402 437,927                
Ending balance at Dec. 31, 2024 $ (6,802)         $ 0 $ 0 $ 3     $ 689,887     $ (692,071) $ (4,621)
Common stock, ending balance (in shares) at Dec. 31, 2024 25,767,369             25,767,369