Quarterly report pursuant to Section 13 or 15(d)

Related Party Agreements (Details Textual)

v3.8.0.1
Related Party Agreements (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 08, 2017
Apr. 08, 2016
Mar. 13, 2016
Mar. 13, 2015
Jul. 26, 2016
May 17, 2016
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Proceeds from Related Party Debt                 $ 0 $ 1,963,000
Founders Agreement Term           15 years        
Professional Fees             $ 60,000 $ 17,500 90,000 $ 30,300
Officers' Compensation             $ 12,500   $ 25,052  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period                 3,013,770  
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures                 $ 1,230,000  
Restricted Stock [Member]                    
Allocated Share-based Compensation Expense                 $ 1,000,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                 180,000  
Private Placement [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights               2,500   2,500
Class of Warrant or Right, Exercise Price of Warrants or Rights             $ 8.50 $ 8.50 $ 8.50 $ 8.50
Class Of Warrant Or Right Expiration Period                 5 years  
General and Administrative Expense [Member]                    
Allocated Share-based Compensation Expense                 $ 1,200,000 $ 300,000
Director [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Description                 Dr. Rosenwald will receive a cash fee of $50,000 per year paid quarterly and an annual stock award of the greater of (i) a number of shares of common stock having a fair market value on the grant date of $50,000 or (ii) 10,000 shares of common stock, which shares shall vest and become non-forfeitable on the third anniversary of the grant date, subject to continued service on the Board on such date.  
Allocated Share-based Compensation Expense                 $ 4,900  
Director [Member] | Restricted Stock [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period             10,000   10,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 180,000               10,000  
Board of Directors Chairman [Member]                    
Professional Fees             $ 15,000   $ 46,200  
Allocated Share-based Compensation Expense             $ 4,800   6,000  
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures                 $ 50,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                 10,000  
Board of Directors Chairman [Member] | Restricted Stock [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period             10,000   10,000  
Fortress Biotech, Inc [Member]                    
Proceeds from Related Party Debt           $ 2,000,000        
Noncontrolling Interest, Ownership Percentage by Parent     2.50%              
Annual Consulting Fees       $ 500,000            
Increase In Annual Consulting Fees                 $ 1,000,000  
Excess In Net Assets Value       $ 100,000,000            
Annual Fees Expenses On Founders Agreement             $ 100,000 $ 100,000 $ 400,000 $ 400,000
Fortress Biotech, Inc [Member] | Research and Development Expense [Member]                    
Annual Fees Expenses On Founders Agreement Percentage             50.00% 50.00% 50.00% 50.00%
Fortress Biotech, Inc [Member] | General and Administrative Expense [Member]                    
Annual Fees Expenses On Founders Agreement Percentage             50.00% 50.00% 50.00% 50.00%
Chord Advisors, LLC [Member]                    
Back Office Accounting Functions Expenses   $ 5,000                
Accounting Analysis And Financial Reporting Fees   $ 7,500                
National Holdings, Inc. [Member]                    
Additional Consideration Under Founders Agreement Description           (i) pay an equity fee in shares of common stock, payable within five (5) business days of the closing of any equity or debt financing for Mustang or any of its respective subsidiaries that occurs after the effective date of the Mustang Founders Agreement and ending on the date when Fortress no longer has majority voting control in the Companys voting equity, equal to two and one-half (2.5%) of the gross amount of any such equity or debt financing; and (ii) pay a cash fee equal to four and one-half percent (4.5%) of the Companys annual net sales, payable on an annual basis, within ninety (90) days of the end of each calendar year. In the event of a Change in Control, the Company will pay a one-time change in control fee equal to five (5x) times the product of (A) net sales for the twelve (12) months immediately preceding the change in control and (B) four and one-half percent (4.5%).        
Business Acquisition, Percentage of Voting Interests Acquired             56.60%   56.60%  
Payments for Other Fees                 $ 5,600,000  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights             861,077   861,077  
Advisor [Member]                    
Annual Consulting Fees                 $ 60,000  
Common Class B [Member]                    
Conversion of Stock, Shares Converted         7,250,000          
Common Class B [Member] | Fortress Biotech, Inc [Member]                    
Stock Issued During Period, Shares, Issued for Services     250,000              
Series A Preferred Stock [Member]                    
Conversion of Stock, Shares Issued         250,000          
Preferred Stock, Voting Rights           Each share of Class A Preferred Stock is convertible, at Fortress option, into one fully paid and nonassessable share of Mustang common stock, subject to certain adjustments. As holders of Class A Preferred Stock, Fortress will receive on each March 13 (each a PIK Dividend Payment Date) until the date all outstanding Class A Preferred Stock is converted into common stock or redeemed (and the purchase price is paid in full), pro rata per share dividends paid in additional fully paid and nonassessable shares of common stock (PIK Dividends) such that the aggregate number of shares of common stock issued pursuant to such PIK Dividend is equal to two and one-half percent (2.5%) of Mustangs fully-diluted outstanding capitalization on the date that is one (1) business day prior to any PIK Dividend Payment Date        
Stock Issued During Period, Shares, Issued for Services                 0  
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures                 $ 0  
Convertible Common Stock [Member]                    
Conversion of Stock, Shares Issued         7,000,000