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Organization and Nature of the Business (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 9 Months Ended
Jun. 07, 2024
USD ($)
$ / shares
shares
Jun. 05, 2024
shares
Oct. 03, 2023
USD ($)
Sep. 29, 2023
item
shares
Feb. 07, 2023
USD ($)
item
$ / shares
shares
Sep. 30, 2025
USD ($)
$ / shares
shares
Jun. 30, 2024
USD ($)
Oct. 31, 2023
USD ($)
Sep. 30, 2025
USD ($)
$ / shares
shares
Sep. 30, 2024
USD ($)
Aug. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
$ / shares
shares
Sep. 28, 2023
$ / shares
Organization and Nature of the Business                          
Shares authorized | shares           500,000,000     500,000,000     500,000,000  
Shares, par value | $ / shares           $ 0.0001     $ 0.0001     $ 0.0001  
Number of ordinary shares for each non voting share converted | item       1                  
Accumulated deficit           $ 503,304     $ 503,304     $ 329,098  
Cash, cash equivalents and short-term investments           799,000     799,000        
IPO                          
Organization and Nature of the Business                          
Number of ADR's for each ordinary share | item         3                
Net proceeds         $ 166,700                
IPO | Common shares                          
Organization and Nature of the Business                          
Conversion of redeemable convertible preferred shares into ordinary shares upon initial public offering (in shares) | shares         67,018,087                
Shares authorized | shares         500,000,000                
Shares, par value | $ / shares         $ 0.0001                
IPO | Designated shares                          
Organization and Nature of the Business                          
Shares authorized | shares         100,000,000                
Shares, par value | $ / shares         $ 0.0001                
Private Placement                          
Organization and Nature of the Business                          
Purchase Price | $ / shares                         $ 12.49
Net proceeds after deducting     $ 281,500         $ 281,500          
Private Placement | Common shares                          
Organization and Nature of the Business                          
Aggregate shares agreed to sell | shares       21,617,295                  
Private Placement | Non-Voting Ordinary Shares                          
Organization and Nature of the Business                          
Aggregate shares agreed to sell | shares       2,401,920                  
Private Placement | American Depositary Shares (ADSs)                          
Organization and Nature of the Business                          
Purchase Price | $ / shares                         $ 37.47
Follow-On Offering                          
Organization and Nature of the Business                          
Net proceeds after deducting $ 512,700           $ 512,700            
Net proceeds                   $ 514,573      
Follow-On Offering | American Depositary Shares (ADSs)                          
Organization and Nature of the Business                          
Purchase Price | $ / shares $ 52.5                        
Sale of Stock, Number of Shares Issued in Transaction | shares 10,427,017                        
Offering | Common shares                          
Organization and Nature of the Business                          
Number of ordinary shares for each ADS   3                      
Offering | American Depositary Shares (ADSs)                          
Organization and Nature of the Business                          
Aggregate shares agreed to sell | shares   9,066,972                      
Underwriters' Option | American Depositary Shares (ADSs)                          
Organization and Nature of the Business                          
Option granted to purchase maximum number of shares | shares   1,360,045                      
Sale of Stock, Number of Shares Issued in Transaction | shares 1,360,045                        
At the Market offering                          
Organization and Nature of the Business                          
Maximum amount of issuance value                     $ 250,000    
Net proceeds                 57,058        
Remaining value of common stock under ATM program           191,500     $ 191,500        
At the Market offering | American Depositary Shares (ADSs)                          
Organization and Nature of the Business                          
Net proceeds after deducting           $ 55,800              
Shares issued | shares           3,040,000              
Gross proceeds           $ 58,500              
Net proceeds           $ 57,100