Quarterly report pursuant to Section 13 or 15(d)

Related Party Agreements (Details)

v3.19.3
Related Party Agreements (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 19, 2019
Mar. 29, 2019
Jul. 22, 2016
May 31, 2019
Apr. 30, 2019
Mar. 29, 2019
Jul. 31, 2016
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Related Party Transaction [Line Items]                        
Share of equity or debt financing used to calculate equity fee or stock issuance to maintain parity (as a percent)     2.50%                  
Proceeds from loan   $ 15,000                    
Placement agent fees                   $ 2,088 $ 0  
Warrants issued   288,184       288,184            
Warrant exercise price (in dollars per share)   $ 3.47       $ 3.47            
Common Stock, Shares, Issued               39,578,371   39,578,371   26,610,183
Common Stock, Shares, Outstanding               39,578,371   39,578,371   26,610,183
General and Administrative Expense.               $ 1,987 $ 1,340 $ 7,520 $ 5,133  
At The Market Offering                        
Related Party Transaction [Line Items]                        
Proceeds from issuance of common shares                   22,000    
Placement agent fees                   $ 500    
Common Stock, Shares, Issued               3,500,000   3,500,000   0
Public Offering                        
Related Party Transaction [Line Items]                        
Proceeds from issuance of common shares         $ 29,500              
Placement agent fees         $ 2,100              
Common Shares                        
Related Party Transaction [Line Items]                        
Issuance of common shares - Founders Agreement (in shares)                   709,314 834,756  
Number of shares converted                   137,608    
Common Shares | City Of Hope National Medical Center ("COH") [Member]                        
Related Party Transaction [Line Items]                        
Number of shares owned               431,196   431,196    
Class A Preferred Shares                        
Related Party Transaction [Line Items]                        
Issuance of common shares - Founders Agreement (in shares)                   0 0  
Number of shares converted                   0    
Class A Common Shares                        
Related Party Transaction [Line Items]                        
Issuance of common shares - Founders Agreement (in shares)                   0 0  
Number of shares converted                   (137,608)    
Common Stock, Shares, Issued               862,392   862,392   1,000,000
Common Stock, Shares, Outstanding               862,392   862,392   1,000,000
Class A Common Shares | City Of Hope National Medical Center ("COH") [Member]                        
Related Party Transaction [Line Items]                        
Number of shares owned               862,392   862,392    
Fortress Biotech, Inc                        
Related Party Transaction [Line Items]                        
Share of equity or debt financing used to calculate equity fee or stock issuance to maintain parity (as a percent)     2.50%                  
Fortress Biotech, Inc | At The Market Offering                        
Related Party Transaction [Line Items]                        
Share of equity or debt financing used to calculate equity fee or stock issuance to maintain parity (as a percent) 2.50%                      
Issuance of common shares - Founders Agreement (in shares) 87,656                      
Expenses from related party transaction                   $ 500    
Proceeds from issuance of common shares $ 22,500                      
Fortress Biotech, Inc | Issuances Related To Debt Financing                        
Related Party Transaction [Line Items]                        
Share of equity or debt financing used to calculate equity fee or stock issuance to maintain parity (as a percent)           2.50%            
Issuance of common shares - Founders Agreement (in shares)           108,069            
Expenses from related party transaction                   400    
Fortress Biotech, Inc | Public Offering                        
Related Party Transaction [Line Items]                        
Share of equity or debt financing used to calculate equity fee or stock issuance to maintain parity (as a percent)       2.50%                
Issuance of common shares - Founders Agreement (in shares)       197,656                
Expenses from related party transaction                   $ 800    
Proceeds from issuance of common shares       $ 31,600                
Fortress Biotech, Inc | Research and development [Member]                        
Related Party Transaction [Line Items]                        
Allocation of fees to income statement account (as a percent)               50.00% 50.00% 50.00% 50.00%  
Fortress Biotech, Inc | General and administrative [Member]                        
Related Party Transaction [Line Items]                        
Allocation of fees to income statement account (as a percent)               50.00% 50.00% 50.00% 50.00%  
Fortress Biotech, Inc | Class A Preferred Shares                        
Related Party Transaction [Line Items]                        
Stock dividend (as a percent)             2.50%          
Preferred Stock, Dividend Rate, Percentage             2.50%          
City Of Hope National Medical Center ("COH") [Member]                        
Related Party Transaction [Line Items]                        
Ownership (as a percent)               3.20%   3.20%    
City Of Hope National Medical Center ("COH") [Member] | Common Shares                        
Related Party Transaction [Line Items]                        
Number of shares issued in conversion         137,608              
City Of Hope National Medical Center ("COH") [Member] | Class A Common Shares                        
Related Party Transaction [Line Items]                        
Number of shares converted         137,608