Annual report pursuant to Section 13 and 15(d)

Related Party Transactions (Details)

Related Party Transactions (Details) - USD ($)
1 Months Ended 12 Months Ended
Sep. 13, 2016
Jun. 26, 2017
Feb. 17, 2015
Dec. 31, 2020
Jun. 12, 2020
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%).  
Maximum credit facility amount         $ 2,000,000
Credit facility amount       $ 0  
Aggregate interest percentage       7.00%  
Invagen Pharmaceuticals Inc [Member]          
Credit facility amount         1,200,000
Fortress [Member]          
Credit facility amount         $ 800,000
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    
AR Founders Agreement [Member]          
Number of shares Exchanged 2,500,000        
Amended Founders Agreements Terms 15 years        
Fortress [Member]          
Long-term Debt, Gross     $ 3,000,000    
Class A Preferred Shares | 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