v3.25.2
Cover Page - shares
6 Months Ended
Jun. 30, 2025
Aug. 05, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-36579  
Entity Registrant Name Adverum Biotechnologies, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 20-5258327  
Entity Address, Address Line One 100 Cardinal Way  
Entity Address, City or Town Redwood City  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94063  
City Area Code 650  
Local Phone Number 656-9323  
Title of 12(b) Security Common Stock, $0.0001 par value  
Trading Symbol ADVM  
Security Exchange Name NASDAQ  
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  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   20,984,161
Amendment Flag false  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Entity Central Index Key 0001501756  
Current Fiscal Year End Date --12-31