Quarterly report pursuant to Section 13 or 15(d)

Related Party Agreements (Details Textual)

Related Party Agreements (Details Textual) - USD ($)
1 Months Ended 3 Months Ended
Sep. 30, 2016
Jun. 30, 2015
Feb. 17, 2015
Mar. 31, 2017
Mar. 31, 2016
Mar. 15, 2015
Agreement Description Terms       (i) issue annually to Fortress, on the anniversary date of the Founders Agreement, shares of common stock equal to two and one half percent (2.5%) of the fully-diluted outstanding equity of Avenue at the time of issuance; (ii) pay an equity fee in shares of Avenue common stock, payable within five (5) business days of the closing of any equity or debt financing for Avenue or any of its respective subsidiaries that occurs after the effective date of the Founders Agreement and ending on the date when Fortress no longer has majority voting control in Avenues voting equity, equal to two and one half percent (2.5%) of the gross amount of any such equity or debt financing; and (iii) pay a cash fee equal to four and one half percent (4.5%) of Avenues 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 (as it is defined in the Founders Agreement), Fortress will be paid a one-time change in control fee equal to five (5x) times the product of (i) net sales for the twelve (12) months immediately preceding the change in control and (ii) four and one-half percent (4.5%).    
Fortress Note [Member]            
Debt Instrument, Interest Rate, Stated Percentage           8.00%
Long-term Debt       $ 2,900,000    
Interest Expense, Debt       57,000 $ 29,000  
National Holdings, Inc. [Member]            
Long-term Debt $ 3,000,000          
Business Acquisition, Percentage of Voting Interests Acquired 56.60%          
Placement Fee, Percentage 10.00%          
Chord Advisors, LLC [Member]            
Annual Advisory Service Fee   $ 7,500   15,000 20,000  
Chord Advisors, LLC [Member] | Prior to Public Company [Member]            
Annual Advisory Service Fee   $ 5,000        
Asset Management Income [Member]            
Annual Consulting Fee     $ 500,000 $ 125,000 $ 125,000  
Increase In Annual Consulting Fee     1,000,000      
Excess In Net Assets Value     100,000,000      
AR Founders Agreement [Member]            
Amended Founders Agreements Terms 15 years          
AR Founders Agreement [Member] | Common Stock [Member]            
Number of shares Exchanged 7,400,000          
Fortress Biotech, Inc [Member]            
Long-term Debt, Gross     $ 3,000,000      
Preferred Class A [Member] | AR Founders Agreement [Member]            
Number of shares Exchanged 250,000          
Common Class A [Member] | AR Founders Agreement [Member]            
Number of shares Exchanged 7,000,000