v3.23.1
Document and Entity Information
Mar. 23, 2023
Cover [Abstract]  
Document Type 8-K
Document Period End Date Mar. 23, 2023
Entity File Number 001-32587
Entity Registrant Name ALTIMMUNE, INC.
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 20-2726770
Entity Address State Or Province MD
Entity Address, Address Line One 910 Clopper Road
Entity Address, Adress Line Two Suite 201S
Entity Address, City or Town Gaithersburg
Entity Address, Postal Zip Code 20878
City Area Code 240
Local Phone Number 654-1450
Title of 12(b) Security Common stock, par value $0.0001 per share
Trading Symbol ALT
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Entity Central Index Key 0001326190
Amendment Flag false
Pre-commencement Issuer Tender Offer false
Pre-commencement Tender Offer false
Soliciting Material false
Written Communications false