v3.26.1
Related Party Agreements (Narrative) (Details) - Parent Company - Fortress Biotech, Inc - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jan. 01, 2026
Jul. 22, 2016
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Management Services Agreement (MSA)              
Related Party Agreements              
Percentage of annual fees expense related to Management Services Agreement recorded in research and development expenses     50.00% 50.00% 50.00% 50.00%  
Percentage of annual fees expense related to Management Services Agreement recorded in general and administrative expenses     50.00% 50.00% 50.00% 50.00%  
Expenses from related party transaction     $ 0.1 $ 0.1      
Founders Agreement              
Related Party Agreements              
Expenses from related party transaction           $ 0.2  
Percentage of fully diluted equity   2.50%         2.50%
Shares issued for services (in shares) 278,385         67,806  
Research and development for expense acquired             $ 0.3