Quarterly report pursuant to Section 13 or 15(d)

Related Party Agreements (Details)

v3.19.2
Related Party Agreements (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
Apr. 19, 2019
May 31, 2019
Apr. 30, 2019
Mar. 29, 2019
Jul. 31, 2016
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Common Stock, Shares, Issued           39,454,316   39,454,316   26,610,183
Annual Fees Expenses On Founders Agreement               $ 400    
Common Stock, Shares, Outstanding           39,454,316   39,454,316   26,610,183
Proceeds From Horizon Notes               $ 15,000 $ 0  
General and Administrative Expense.           $ 3,189 $ 1,683 $ 5,533 $ 3,793  
Market Offering                    
Common Stock, Shares, Issued           3,500,000   3,500,000   0
Proceeds From Horizon Notes           $ 22,500   $ 22,500    
Public Offering [Member]                    
Common Stock, Shares, Issued     6,875,000              
Proceeds From Horizon Notes     $ 31,600              
City of Hope                    
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners           3.20%   3.20%    
Fortress Biotech, Inc                    
Stock Issued During Period, Shares, Issued for Services       108,069            
Fortress Biotech, Inc | Market Offering                    
Stock Issued During Period, Shares, Issued for Services 87,656                  
Proceeds From Horizon Notes $ 22,500                  
Shares Of Common Stock, Percentage 2.50%                  
General and Administrative Expense.               $ 500    
Fortress Biotech, Inc | Public Offering [Member]                    
Common Stock, Shares, Issued   197,656                
Proceeds From Horizon Notes   $ 31,600                
Shares Of Common Stock, Percentage   2.50%                
General and Administrative Expense.               $ 800    
Fortress Biotech, Inc | Research and Development Expense                    
Annual Fees Expenses On Founders Agreement Percentage           50.00% 50.00% 50.00% 50.00%  
Fortress Biotech, Inc | General and Administrative Expense                    
Annual Fees Expenses On Founders Agreement Percentage           50.00% 50.00% 50.00% 50.00%  
Class A Preferred Stock                    
Stock Issued During Period, Shares, Issued for Services               0 0  
Conversion of Stock, Shares Converted           0   0    
Class A Preferred Stock | Fortress Biotech, Inc                    
Preferred Stock, Dividend Rate, Percentage         2.50%          
Common Stock A One | City of Hope                    
Common Stock, Shares, Outstanding           862,392   862,392    
Common Stock A Two | City of Hope                    
Common Stock, Shares, Outstanding           431,196   431,196    
Class A Common Shares                    
Common Stock, Shares, Issued           862,392   862,392   1,000,000
Common Stock, Shares, Outstanding           862,392   862,392   1,000,000
Stock Issued During Period, Shares, Issued for Services               0 0  
Conversion of Stock, Shares Converted     137,608     (137,608)   (137,608)    
Common Shares                    
Stock Issued During Period, Shares, Issued for Services               709,314 834,756  
Conversion of Stock, Shares Converted     137,608     137,608   137,608    
Common Shares | Fortress Biotech, Inc                    
Shares Of Common Stock, Percentage       2.50%