v3.26.1
Cover
May 19, 2026
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date May 19, 2026
Entity File Number 001-35285
Entity Registrant Name Vaxart, Inc.
Entity Central Index Key 0000072444
Entity Tax Identification Number 59-1212264
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 310 Utah Avenue
Entity Address, Address Line Two Suite 150
Entity Address, City or Town South San Francisco
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94080
City Area Code 650
Local Phone Number 550-3500
Written Communications false
Soliciting Material true
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false