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Segments - Schedule of Forth Disaggregated Research and Development Expenses (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Total research and development expenses $ 9,714 $ 6,575 $ 19,087 $ 23,902
Operating Segments [Member]        
Segment Reporting [Line Items]        
Total research and development expenses 9,714 6,575 19,087 23,902
Operating Segments [Member] | Unallocated Expense [Member] | Personnel Related [Member]        
Segment Reporting [Line Items]        
Total research and development expenses 2,346 1,452 4,699 3,209
Operating Segments [Member] | Unallocated Expense [Member] | Other Research and Development Expense [Member]        
Segment Reporting [Line Items]        
Total research and development expenses 562 426 1,004 693
Operating Segments [Member] | Direct Expense [Member] | Budoprutug Service [Member]        
Segment Reporting [Line Items]        
Total research and development expenses 5,288 4,521 10,651 10,662
Operating Segments [Member] | Direct Expense [Member] | CLYM116 [Member]        
Segment Reporting [Line Items]        
Total research and development expenses [1] 1,511 145 2,704 9,265
Operating Segments [Member] | Direct Expense [Member] | Legacy Program Expenses [Member]        
Segment Reporting [Line Items]        
Total research and development expenses [2] $ 7 $ 31 $ 29 $ 73
[1] Includes the upfront payment and the associated direct transaction costs incurred in connection with the Mabworks Agreement for the six months ended June 30, 2025.
[2] Includes direct expenses related to the Company’s legacy product candidates ETX-123 and ETX-155.