v3.25.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2025
Aug. 08, 2025
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Entity Registrant Name AURA BIOSCIENCES, INC.  
Entity Central Index Key 0001501796  
Entity File Number 001-40971  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 32-0271970  
Entity Address, Address Line One 80 Guest Street  
Entity Address, City or Town Boston  
Entity Address, State or Province MA  
Entity Address, Postal Zip Code 02135  
City Area Code 617  
Local Phone Number 500-8864  
Entity Interactive Data Current Yes  
Entity Current Reporting Status Yes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Title of 12(b) Security Common Stock, par value $0.00001 per share  
Trading Symbol AURA  
Security Exchange Name NASDAQ  
Document Quarterly Report true  
Document Transition Report false  
Entity Common Stock, Shares Outstanding   62,119,873