v3.26.1
Segment data - Schedule of Company's reportable segment net revenues and loss (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Revenue:              
Collaboration Revenue $ 8,968   $ 23,194   $ 13,178 $ 108,123  
External research and development expenses:              
Other development and discovery programs 9,796   4,986   19,384 9,450  
Research and development personnel expense 13,901   11,758   27,394 23,110  
Overhead and administrative expense 10,450   7,850   20,562 16,079  
General and administrative expenses:              
General and administrative expenses personnel expense 6,649   5,479   13,069 11,158  
Professional services 1,702   1,050   3,845 2,528  
Facility costs and other expense 1,783   1,566   3,395 3,112  
Other income (expense):              
Interest and other income, net 5,941   4,458   11,524 8,129  
Income tax provision (208)   (1,199)   (260) (2,021)  
Net (loss) income (43,397) $ (44,503) (12,295) $ 46,885 (87,900) 34,590 $ (38,600)
MRT-2359              
External research and development expenses:              
External research and development expenses 3,520   2,243   5,901 4,187  
MRT-6160              
External research and development expenses:              
External research and development expenses 16   1,477   27 5,458  
MRT-8102              
External research and development expenses:              
External research and development expenses 8,660   1,623   15,441 3,081  
CCNE1              
External research and development expenses:              
External research and development expenses $ 1,621   $ 716   $ 3,324 $ 1,478