Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Additional Information (Details)

v3.21.2
Significant Accounting Policies - Additional Information (Details) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Jan. 01, 2021
Sep. 30, 2021
Dec. 31, 2020
Mar. 17, 2015
Percentage of annual equity fee       2.50%
Fortress Biotech, Inc        
Percentage of annual equity fee 2.50% 2.50%    
Number of common stock shares issued 1,742,449 271,515    
Research and development        
Value of common stock shares issued     $ 4.6