Quarterly report pursuant to Section 13 or 15(d)

Related Party Agreements (Details Textual)

v3.19.1
Related Party Agreements (Details Textual) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 29, 2019
Jul. 31, 2016
Mar. 31, 2015
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Annual Fees Expenses On Founders Agreement       $ 400      
Common Stock, Shares, Outstanding       27,561,433     26,610,183
General and Administrative Expense       $ 2,344 $ 2,060    
City of Hope [Member]              
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners       4.50%      
Fortress Biotech, Inc [Member]              
Annual Consulting Fees     $ 500        
Increase In Annual Consulting Fees     1,000        
Excess In Net Assets Value     $ 100,000        
Annual Fees Expenses On Founders Agreement       $ 100 $ 100    
Stock Issued During Period, Shares, Issued for Services 108,069            
Research and Development Asset Acquired Other than Through Business Combination, Fair Value Acquired           $ 9,600  
Fortress Biotech, Inc [Member] | Research and Development Expense [Member]              
Annual Fees Expenses On Founders Agreement Percentage       50.00% 50.00%    
Fortress Biotech, Inc [Member] | General and Administrative Expense [Member]              
Annual Fees Expenses On Founders Agreement Percentage       50.00% 50.00%    
Series A Preferred Stock [Member]              
Stock Issued During Period, Shares, Issued for Services   250,000   0 0    
Series A Preferred Stock [Member] | Fortress Biotech, Inc [Member]              
Preferred Stock, Dividend Rate, Percentage   2.50%          
Common Stock A One [Member] | City of Hope [Member]              
Common Stock, Shares, Outstanding       1,000,000      
Common Stock A Two [Member] | City of Hope [Member]              
Common Stock, Shares, Outstanding       293,588      
Common Stock [Member]              
Stock Issued During Period, Shares, Issued for Services       709,314 834,756    
Common Stock [Member] | Fortress Biotech, Inc [Member]              
Shares Of Common Stock, Percentage 2.50%