Quarterly report pursuant to Section 13 or 15(d)

Related Party Agreements (Details Textual)

v3.10.0.1
Related Party Agreements (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Feb. 02, 2018
Jul. 31, 2016
Mar. 31, 2015
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Common Stock, Shares, Outstanding       26,263,354   26,263,354   25,236,255  
Restricted Stock [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross           50,000      
Fortress Biotech, Inc [Member]                  
Annual Consulting Fees     $ 500,000            
Increase In Annual Consulting Fees           $ 1,000,000      
Excess In Net Assets Value     $ 100,000,000            
Research and Development Asset Acquired Other than Through Business Combination, Fair Value Acquired               $ 9,600,000 $ 4,400,000
Annual Fees Expenses On Founders Agreement       $ 100,000 $ 100,000 $ 300,000 $ 300,000    
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%    
National Holdings, Inc. [Member]                  
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures         $ 5,600,000   $ 5,600,000    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights         860,077   860,077    
City Of Hope [Member]                  
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners       4.70%   4.70%      
TG Therapeutics, Inc. [Member]                  
Revenues $ 50,000                
Series A Preferred Stock [Member]                  
Stock Issued During Period, Shares, Issued for Services           0      
Series A Preferred Stock [Member] | Fortress Biotech, Inc [Member]                  
Stock Issued During Period, Shares, Issued for Services   250,000              
Preferred Stock, Dividend Rate, Percentage   2.50%              
Common Stock A One [Member] | City Of Hope [Member]                  
Common Stock, Shares, Outstanding       1,000,000   1,000,000      
Common Stock A Two [Member] | City Of Hope [Member]                  
Common Stock, Shares, Outstanding       293,588   293,588