v3.26.1
Fair Value Measurements - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Restricted cash $ 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”).    
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   $ 0