Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.21.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2021
Aug. 10, 2021
Document and Entity Information [Abstract]    
Document Type 10-Q  
Document Period End Date Jun. 30, 2021  
Entity Registrant Name AVENUE THERAPEUTICS, INC.  
Document Quarterly Report true  
Document Transition Report false  
Entity File Number 001-38114  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 47-4113275  
Entity Address, Address Line One 1140 Avenue of the Americas, Floor 9  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10036  
City Area Code 781  
Local Phone Number 652-4500  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   16,748,068
Entity Central Index Key 0001644963  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Title of 12(b) Security Common Stock  
Trading Symbol ATXI  
Security Exchange Name NASDAQ  
Entity Ex Transition Period true