Quarterly report pursuant to Section 13 or 15(d)

Related Party Agreements (Narrative) (Details)

v3.21.2
Related Party Agreements (Narrative) (Details) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 01, 2021
Jul. 22, 2016
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Related Party Transaction [Line Items]              
Proceeds from issuance of common shares         $ 0 $ 37,230,000  
At the Market Offering [Member]              
Related Party Transaction [Line Items]              
Proceeds from issuance of common shares         $ 66,900,000 $ 25,600,000  
Fortress Biotech, Inc [Member]              
Related Party Transaction [Line Items]              
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%  
Shares issued for services (in shares) 2,001,490       517,304    
Proceeds from issuance of common shares           $ 66,900,000  
Percentage of fully diluted equity 2.50% 2.50%       2.50%  
Expenses from related party transaction         $ 375,000 $ 375,000  
Fortress Biotech, Inc [Member] | Research and Development [Member]              
Related Party Transaction [Line Items]              
Expenses from related party transaction             $ 7,600,000
Fortress Biotech, Inc [Member] | General and Administrative [Member]              
Related Party Transaction [Line Items]              
Expenses from related party transaction         $ 1,700,000