v3.26.1
Related Party Transactions - Research and development Costs (Details) - USD ($)
$ in Thousands
12 Months Ended
Oct. 24, 2025
Dec. 31, 2025
Dec. 31, 2024
Related Party Transactions      
Total operating costs and expenses   $ 61,292 $ 67,890
Advent BioServices      
Related Party Transactions      
Total operating costs and expenses $ 16,420   $ 21,370
Operating Cost and Expense, Related Party, Type [Extensible Enumeration]   Related Party [Member] Related Party [Member]
Advent BioServices | Manufacturing cost in London      
Related Party Transactions      
Related party costs, Manufacturing costs 5,673   $ 7,601
Advent BioServices | Manufacturing cost at Sawston facility      
Related Party Transactions      
Related party costs, Manufacturing costs 10,155   11,412
Advent BioServices | SOW 8 one-time milestones - Expensed and paid (milestone complete)      
Related Party Transactions      
Related party costs, SOW one-time milestones - Cash     712
Advent BioServices | SOW 8 one-time milestones -Expensed and due, but unpaid (milestone complete)      
Related Party Transactions      
Related party costs, SOW one-time milestones - Cash 285   1,359
Advent BioServices | SOW 8 one-time milestones - Expensed but unpaid, not yet due (milestone not yet complete)      
Related Party Transactions      
Related party costs, SOW one-time milestones - Cash $ 307   $ 286