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Common Stock - January 2024 Financing (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended 114 Months Ended
Jan. 08, 2024
USD ($)
$ / shares
shares
Jan. 04, 2024
USD ($)
tranche
$ / shares
Jun. 30, 2025
USD ($)
shares
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
shares
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
shares
Dec. 31, 2024
shares
Mar. 04, 2024
USD ($)
shares
Mar. 03, 2024
shares
Class of Stock [Line Items]                    
Proceeds from issuance of private placement             $ 496,300      
Reclassification of future tranche right liability upon settlement                 $ 4,800  
Common stock, shares authorized (in shares) | shares 130,000,000   500,000,000   500,000,000   500,000,000 500,000,000 500,000,000  
Change in fair value of the tranche rights     $ 0 $ 0 $ 0 $ 4,796        
Equity                    
Class of Stock [Line Items]                    
Change in fair value of the tranche rights           4,000        
Other Expense                    
Class of Stock [Line Items]                    
Change in fair value of the tranche rights           $ 1,700        
Private Placement | Common Stock                    
Class of Stock [Line Items]                    
Private placement, number of tranche | tranche   3                
Sale of stock, price per share (in usd per share) | $ / shares   $ 0.0001                
Private Placement | Common Stock | Tranche 1                    
Class of Stock [Line Items]                    
Proceeds from issuance of private placement $ 80,000                  
Private Placement | Common Stock | Tranche 2                    
Class of Stock [Line Items]                    
Proceeds from issuance of private placement   $ 80,000                
Private Placement | Common Stock | Tranche 3                    
Class of Stock [Line Items]                    
Proceeds from issuance of private placement   $ 80,000                
Private Placement | Pre-funded stock warrants                    
Class of Stock [Line Items]                    
Sale of stock, price per share (in usd per share) | $ / shares   $ 0.0001                
Common Stock | Common Stock                    
Class of Stock [Line Items]                    
Reclassification of future tranche right liability upon settlement 23,600                  
Common stock, shares authorized (in shares) | shares                 500,000,000 130,000,000
Common Stock and Pre-funded Warrants | Common Stock and Pre-funded Warrants                    
Class of Stock [Line Items]                    
Tranche rights as a liability, remainder amount 80,000                  
Tranche rights as a liability, received amount $ 56,400                  
Accredited Investors | Private Placement                    
Class of Stock [Line Items]                    
Proceeds from issuance of private placement   $ 240,000                
Accredited Investors | Private Placement | Common Stock | Tranche 1                    
Class of Stock [Line Items]                    
Sale of stock, price per share (in usd per share) | $ / shares $ 1.43                  
Consideration received on transaction $ 80,000                  
Number of shares registered for resale (in shares) | shares 55,944,850                  
Accredited Investors | Private Placement | Common Stock | Tranche 2                    
Class of Stock [Line Items]                    
Sale of stock, price per share (in usd per share) | $ / shares   $ 1.716                
Consideration received on transaction   $ 80,000                
Sale of stock, consideration received (as a percent)   120.00%                
Number of tranche subjected to condition | tranche   3                
Threshold trading days for weighted average price calculation (in days)   10 days                
Weighted average price (in usd per share) | $ / shares   $ 8.00                
Threshold trading days for aggregate trading volume calculation (in days)   10 days                
Aggregate trading volume of last 10 days   $ 100,000                
Accredited Investors | Private Placement | Common Stock | Tranche 3                    
Class of Stock [Line Items]                    
Consideration received on transaction   $ 80,000                
Third tranche close period after second tranche (in years)   3 years