v3.26.1
Segment information - Schedule Of research and development expenses have been disaggregated (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting Information [Line Items]        
Research and development $ 56,083 $ 42,760 $ 104,630 $ 86,404
Tarcocimab Program Expenses        
Segment Reporting Information [Line Items]        
Research and development 9,406 11,886 19,351 26,162
KSI-501 Program Expenses        
Segment Reporting Information [Line Items]        
Research and development 12,746 3,862 22,603 7,162
KSI-101 Program Expenses        
Segment Reporting Information [Line Items]        
Research and development 12,279 1,447 19,279 2,364
ABC Platform And Other Program Expenses        
Segment Reporting Information [Line Items]        
Research and development 3,607 6,421 7,373 12,066
Payroll And Personnel Expenses        
Segment Reporting Information [Line Items]        
Research and development 13,672 14,109 27,851 28,379
Facilities And Other Research And Development Expenses        
Segment Reporting Information [Line Items]        
Research and development $ 4,373 $ 5,035 $ 8,173 $ 10,271