v3.26.1
Fair Value Measurements - Additional Information (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Restricted cash $ 5,248,000 $ 4,393,000 $ 5,248,000  
Description of hybrid instruments accounted for at fair value   The hybrid method is a hybrid between the probability-weighted expected returns method (the “PWERM”) and the option-pricing model backsolve method (the “OPM”).    
Loss related to change in fair value $ (1,300,000)   $ (1,300,000)  
Affini-T Therapeutics, Inc.        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Estimated fair value of investments   $ 0   $ 0
Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Restricted cash   4,400,000   $ 5,200,000
Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Estimated fair value of investments   $ 0