Annual report pursuant to Section 13 and 15(d)

Related Party Agreements (Details Textual)

v3.19.1
Related Party Agreements (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Jul. 05, 2017
May 15, 2017
Sep. 13, 2016
Jun. 26, 2017
Jun. 25, 2017
Sep. 30, 2016
Feb. 17, 2015
Dec. 31, 2018
Dec. 31, 2017
May 17, 2017
Dec. 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 Avenue’s 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 Avenue’s 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%).        
Stock Issued During Period, Value, New Issues               $ 0 $ 948,000      
Stockholders' Equity, Period Increase (Decrease)                 632,000      
Deferred Offering Costs               1,702,000 0      
Debt Instrument, Periodic Payment, Principal         $ 3,500,000              
Debt Instrument, Periodic Payment, Interest         $ 100,000              
Service Agreement Expenses               400,000 500,000      
Extend Loan Modification, Reduction to interest Expense               300,000        
IPO [Member]                        
Number of shares Exchanged       158,125                
Financing Fee       $ 0.9                
Common Stock [Member]                        
Stock Issued During Period, Value, New Issues               0 0      
Stockholders' Equity, Period Increase (Decrease)                 0      
Fortress Note [Member]                        
Debt Instrument, Interest Rate, Stated Percentage                       8.00%
Interest Expense, Debt       $ 300,000       0 74,000      
Fortress Note [Member] | Maximum [Member]                        
Annual Consulting Fee               $ 400,000        
Debt Instrument, Interest Rate, Stated Percentage               8.00%   8.00%    
Fortress Note [Member] | Minimum [Member]                        
Annual Consulting Fee               $ 100,000        
Debt Instrument, Interest Rate, Stated Percentage               2.00%   2.00%    
Fortress Note [Member] | IPO [Member]                        
Stockholders' Equity, Period Increase (Decrease)   $ 500,000                    
Percentage Of Conversion Shares       2.50%                
NSC Notes Memebers [Member]                        
Long-term Debt, Gross             $ 3,000,000 $ 0 $ 0   $ 3,000,000  
Debt Instrument, Periodic Payment, Interest $ 2,000                      
NSC Notes Memebers [Member] | IPO [Member]                        
Stock Issued During Period, Value, New Issues       $ 125,000                
Deferred Offering Costs       3,000,000                
National Holdings, Inc. [Member]                        
Long-term Debt           $ 3,000,000            
Business Acquisition, Percentage of Voting Interests Acquired           56.60%            
Placement Fee, Percentage           10.00%            
Debt Instrument, Periodic Payment, Principal           $ 3,000,000            
Debt Instrument, Periodic Payment, Interest           $ 2,000            
National Holdings, Inc. [Member] | IPO [Member]                        
Earnings of commission and fees       2,300,000                
Asset Management Income [Member]                        
Annual Consulting Fee       500,000                
Increase In Annual Consulting Fee             1,000,000          
Excess In Net Assets Value             100,000,000          
Asset Management Income [Member] | IPO [Member]                        
Stock Issued During Period, Value, New Issues       166,666                
Due to Related Parties, Current       $ 1,000,000                
Shares Issued, Price Per Share       $ 6.00                
AR Founders Agreement [Member]                        
Amended Founders Agreements Terms     15 years                  
AR Founders Agreement [Member] | Common Stock [Member]                        
Number of shares Exchanged     2,500,000                  
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     2,300,000