Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies (Details)

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Significant Accounting Policies (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Jan. 01, 2023
Sep. 30, 2023
Dec. 31, 2022
Mar. 17, 2015
Fortress Biotech, Inc        
Significant Accounting Policies        
Percentage of shares issued for offering and annual equity fee 2.50%     2.50%
Number of shares issued and sold 368,907 240,526    
Research and development        
Significant Accounting Policies        
Value of common stock shares issued     $ 1.9