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Summary of Significant Accounting Policies - Basis of Presentation and Going Concern (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jan. 21, 2026
Dec. 31, 2025
Dec. 31, 2024
May 07, 2025
Oct. 02, 2022
Concentration Risk [Line Items]          
Cash and cash equivalents   $ 13,164 $ 43,499    
Accumulated deficit   (1,018,554) (969,603)    
Cash used in operating activities   (64,854) (89,060)    
Net loss   $ (48,951) $ (137,731)    
Stock price (usd per share)       $ 0.24 $ 10.00
Purchase Agreement          
Concentration Risk [Line Items]          
Conversion of stock, converted (in shares)   3,250,322      
Purchase price   $ 40,000      
Purchase Agreement | Preferred Stock          
Concentration Risk [Line Items]          
Shares issued in transaction (in shares)   20,000,000      
Private Placement | Subsequent Event          
Concentration Risk [Line Items]          
Shares issued in transaction (in shares) 4,000,000        
Purchase price $ 20,000        
Stock price (usd per share) $ 5.00        
Conversion of preferred stock into common stock (in shares) 510,968