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CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) AND CONVERTIBLE PREFERRED STOCK - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Series A Convertible Preferred Stock
Series A Convertible Preferred Stock
Common Stock
Series A Convertible Preferred Stock
Additional Paid-in Capital
Series B Convertible Preferred Stock
Series B Convertible Preferred Stock
Common Stock
Series B Convertible Preferred Stock
Additional Paid-in Capital
Series C Convertible Preferred Stock
Series C Convertible Preferred Stock
Common Stock
Series C Convertible Preferred Stock
Additional Paid-in Capital
Initial Public Offering
Initial Public Offering
Common Stock
Initial Public Offering
Additional Paid-in Capital
Public offering
Public offering
Common Stock
Public offering
Additional Paid-in Capital
Beginning Balance at Dec. 31, 2023           $ 36,501     $ 115,856                      
Beginning Balance, Shares at Dec. 31, 2023           53,598,587     129,240,032                      
Beginning Balance at Dec. 31, 2023 $ (72,468) $ 1 $ 3,054 $ (75,583) $ 60                              
Beginning Balance, Shares at Dec. 31, 2023   1,257,080                                    
Issuance of common stock upon exercise of stock options 198   198                                  
Issuance of common stock upon exercise of stock options, Shares   35,918                                    
Stock-based compensation expense 1,623   1,623                                  
Net loss (12,337)     (12,337)                                
Other comprehensive income (loss) (63)       (63)                              
Ending Balance at Mar. 31, 2024           $ 36,501     $ 115,856                      
Ending Balance, Shares at Mar. 31, 2024           53,598,587     129,240,032                      
Ending Balance at Mar. 31, 2024 (83,047) $ 1 4,875 (87,920) (3)                              
Ending Balance, Shares at Mar. 31, 2024   1,292,998                                    
Beginning Balance at Dec. 31, 2023           $ 36,501     $ 115,856                      
Beginning Balance, Shares at Dec. 31, 2023           53,598,587     129,240,032                      
Beginning Balance at Dec. 31, 2023 (72,468) $ 1 3,054 (75,583) 60                              
Beginning Balance, Shares at Dec. 31, 2023   1,257,080                                    
Net loss (46,336)                                      
Other comprehensive income (loss) 46                                      
Ending Balance at Sep. 30, 2024 271,368 $ 5 393,176 (121,919) 106                              
Ending Balance, Shares at Sep. 30, 2024   33,376,058                                    
Beginning Balance at Dec. 31, 2023           $ 36,501     $ 115,856                      
Beginning Balance, Shares at Dec. 31, 2023           53,598,587     129,240,032                      
Beginning Balance at Dec. 31, 2023 (72,468) $ 1 3,054 (75,583) 60                              
Beginning Balance, Shares at Dec. 31, 2023   1,257,080                                    
Net loss (61,900)                                      
Ending Balance at Dec. 31, 2024 257,442 $ 5 394,887 (137,505) 55                              
Ending Balance, Shares at Dec. 31, 2024   33,421,525                                    
Beginning Balance at Mar. 31, 2024           $ 36,501     $ 115,856                      
Beginning Balance, Shares at Mar. 31, 2024           53,598,587     129,240,032                      
Beginning Balance at Mar. 31, 2024 (83,047) $ 1 4,875 (87,920) (3)                              
Beginning Balance, Shares at Mar. 31, 2024   1,292,998                                    
Issuance of common stock upon exercise of stock options 112 $ 1 111                                  
Issuance of common stock upon exercise of stock options, Shares   24,101                                    
Stock-based compensation expense 919   919                                  
Net loss (15,857)     (15,857)                                
Other comprehensive income (loss) (12)       (12)                              
Ending Balance at Jun. 30, 2024           $ 36,501     $ 115,856                      
Ending Balance, Shares at Jun. 30, 2024           53,598,587     129,240,032                      
Ending Balance at Jun. 30, 2024 (97,885) $ 2 5,905 (103,777) (15)                              
Ending Balance, Shares at Jun. 30, 2024   1,317,099                                    
Issuance of Convertible Preferred Stock, net of issuance costs                       $ 63,221                
Issuance of Convertible Preferred Stock, net of issuance costs, Shares                       61,650,480                
Conversion of Convertible Preferred Stock to common stock upon closing of the initial public offering           $ (36,501)     $ (115,856)     $ (63,221)                
Conversion of Convertible Preferred Stock to common stock upon closing of the initial public offering, Shares           (53,598,587)     (129,240,032)     (61,650,480)                
Conversion of Convertible Preferred Stock to common stock upon closing of the initial public offering           $ 36,501   $ 36,501 $ 115,856 $ 1 $ 115,855 $ 63,221 $ 1 $ 63,220            
Conversion of Convertible Preferred Stock to common stock upon closing of the initial public offering, Shares             4,458,324     10,750,183     5,128,092              
Issuance of common stock , net of issuance costs                             $ 170,469 $ 1 $ 170,468      
Issuance of common stock , net of issuance costs , Shares                               11,730,000        
Issuance of common stock upon exercise of stock options 35   35                                  
Issuance of common stock upon exercise of stock options, Shares   602                                    
Repurchase of restricted stock due to early exercised unvested stock options, Shares   (8,242)                                    
Stock-based compensation expense 1,192   1,192                                  
Net loss (18,142)     (18,142)                                
Other comprehensive income (loss) 121       121                              
Ending Balance at Sep. 30, 2024 271,368 $ 5 393,176 (121,919) 106                              
Ending Balance, Shares at Sep. 30, 2024   33,376,058                                    
Beginning Balance at Dec. 31, 2024 257,442 $ 5 394,887 (137,505) 55                              
Beginning Balance, Shares at Dec. 31, 2024   33,421,525                                    
Issuance of common stock upon exercise of stock options 4   4                                  
Issuance of common stock upon exercise of stock options, Shares   3,019                                    
Repurchase of restricted stock due to early exercised unvested stock options, Shares   (173)                                    
Repurchase of restricted stock due to early exercised unvested stock options 19   19                                  
Stock-based compensation expense 1,839   1,839                                  
Net loss (23,880)     (23,880)                                
Other comprehensive income (loss) (2)       (2)                              
Ending Balance at Mar. 31, 2025 235,422 $ 5 396,749 (161,385) 53                              
Ending Balance, Shares at Mar. 31, 2025   33,424,371                                    
Beginning Balance at Dec. 31, 2024 $ 257,442 $ 5 394,887 (137,505) 55                              
Beginning Balance, Shares at Dec. 31, 2024   33,421,525                                    
Issuance of common stock upon exercise of stock options, Shares 186,091                                      
Net loss $ (64,909)                                      
Other comprehensive income (loss) $ 99                                      
Ending Balance, Shares at Sep. 30, 2025 0                                      
Ending Balance at Sep. 30, 2025 $ 387,538 $ 6 589,792 (202,414) 154                              
Ending Balance, Shares at Sep. 30, 2025   44,715,498                                    
Beginning Balance at Mar. 31, 2025 235,422 $ 5 396,749 (161,385) 53                              
Beginning Balance, Shares at Mar. 31, 2025   33,424,371                                    
Issuance of common stock upon exercise of stock options 1,333   1,333                                  
Issuance of common stock upon exercise of stock options, Shares   167,855                                    
Stock-based compensation expense 1,937   1,937                                  
Net loss (19,411)     (19,411)                                
Other comprehensive income (loss) (42)       (42)                              
Ending Balance at Jun. 30, 2025 219,239 $ 5 400,019 (180,796) 11                              
Ending Balance, Shares at Jun. 30, 2025   33,592,226                                    
Issuance of common stock , net of issuance costs                                   $ 187,390 $ 1 $ 187,389
Issuance of common stock , net of issuance costs , Shares                                     11,108,055  
Issuance of common stock upon exercise of stock options 139   139                                  
Issuance of common stock upon exercise of stock options, Shares   15,217                                    
Stock-based compensation expense 2,245   2,245                                  
Net loss (21,618)     (21,618)                                
Other comprehensive income (loss) $ 143       143                              
Ending Balance, Shares at Sep. 30, 2025 0                                      
Ending Balance at Sep. 30, 2025 $ 387,538 $ 6 $ 589,792 $ (202,414) $ 154                              
Ending Balance, Shares at Sep. 30, 2025   44,715,498