v3.26.1
Investment in MiNK Therapeutics, Inc. - Summarized Balance Sheet Information and Results of Operations (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Investment Company, Nonconsolidated Subsidiary [Line Items]              
Current assets $ 78,810       $ 78,810   $ 133,436
Current liabilities 231,820       231,820   $ 323,489
Net loss attributable to Agenus (567) $ 39,206 $ (30,012) $ (26,370) 38,639 $ (56,382)  
MiNK Therapeutics, Inc.              
Investment Company, Nonconsolidated Subsidiary [Line Items]              
Current assets 9,297       9,297    
Non-current assets 318       318    
Current liabilities 7,569       7,569    
Non-current liabilities 16,075       16,075    
Net loss (3,128)       (5,871)    
Net loss attributable to Agenus $ (1,336)       $ (2,508)