Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.20.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2019
Mar. 29, 2020
Jun. 30, 2019
Document and Entity Information [Abstract]      
Document Type 10-K    
Document Period End Date Dec. 31, 2019    
Entity Registrant Name AVENUE THERAPEUTICS, INC.    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
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 Public Float     $ 40,871,294
Entity Common Stock, Shares Outstanding   16,682,803  
Entity Central Index Key 0001644963    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false    
Trading Symbol ATXI    
Entity Ex Transition Period true