Annual report pursuant to Section 13 and 15(d)


Cover - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Mar. 27, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-37590    
Entity Registrant Name AVALO THERAPEUTICS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 45-0705648    
Entity Address, Address Line One 540 Gaither Road    
Entity Address, Address Line Two Suite 400    
Entity Address, City or Town Rockville    
Entity Address, State or Province MD    
Entity Address, Postal Zip Code 20850    
City Area Code 410    
Local Phone Number 522-8707    
Title of 12(b) Security Common Stock, $0.001 Par Value    
Trading Symbol AVTX    
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 false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 4.8
Entity Common Stock, Shares Outstanding   1,034,130  
Entity Central Index Key 0001534120    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false