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Related-Party Transactions (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2024
USD ($)
shares
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
d
$ / shares
shares
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
shares
Sep. 29, 2023
shares
Related Party Transaction [Line Items]            
Common stock, shares outstanding (in shares) 25,771,132   25,771,132   21,888,976 21,888,976
Award trading restriction period     2 years      
Research and development expense | $ $ 3,086,000 $ 4,049,000 $ 6,322,000 $ 7,648,000    
Accounts payable | $ $ 12,694,000   $ 12,694,000   $ 11,040,000  
Convertible Bridge Loan Warrants            
Related Party Transaction [Line Items]            
Warrants issued (in shares) 1,250,000   1,250,000      
Related Party Convertible Bridge Loan Warrants            
Related Party Transaction [Line Items]            
Warrants issued (in shares) 400,000   400,000      
Related party | Convertible Bridge Loan Warrants | Convertible Debt            
Related Party Transaction [Line Items]            
Warrants issued (in shares) 550,000   550,000      
Related party | Related Party Convertible Bridge Loan Warrants            
Related Party Transaction [Line Items]            
Warrants issued (in shares) 400,000   400,000      
Amended And Restated Sponsor Support Lockup Agreement | Related party | Graf Acquisition Partners IV LLC            
Related Party Transaction [Line Items]            
Common stock, shares outstanding (in shares) 4,290,375   4,290,375      
Shares forfeited (in shares)     1,773,631      
Restricted shares subject to vesting conditions (in shares)     1,173,631      
Shares were not forfeited, did not become restricted, nor subject to vesting conditions (in shares)     1,343,113      
Purchases of Laboratory Supplies | Related party            
Related Party Transaction [Line Items]            
Research and development expense | $ $ 0 $ 0 $ 0 $ 0    
Accounts payable | $ $ 0   $ 0   $ 600,000  
Deferred Founder Shares | Amended And Restated Sponsor Support Lockup Agreement | Related party | Graf Acquisition Partners IV LLC            
Related Party Transaction [Line Items]            
Vesting period     5 years      
Deferred Founder Shares | Trance One | Amended And Restated Sponsor Support Lockup Agreement | Related party | Graf Acquisition Partners IV LLC            
Related Party Transaction [Line Items]            
Share price trigger (in USD per share) | $ / shares     $ 14.00      
Threshold trading days | d     20      
Threshold consecutive trading days | d     30      
Shares vested (in shares)     873,631      
Deferred Founder Shares | Tranche Two | Amended And Restated Sponsor Support Lockup Agreement | Related party | Graf Acquisition Partners IV LLC            
Related Party Transaction [Line Items]            
Share price trigger (in USD per share) | $ / shares     $ 20.00      
Threshold trading days | d     20      
Threshold consecutive trading days | d     30      
Shares vested (in shares)     300,000