Document And Entity Information
Sep. 17, 2021
Document Information [Line Items]  
Entity, Registrant Name Vaxart, Inc.
Document, Type 8-K
Document, Period End Date Sep. 17, 2021
Entity, Incorporation, State or Country Code DE
Entity, File Number 001-35285
Entity, Tax Identification Number 59-1212264
Entity, Address, Address Line One 170 Harbor Way, Suite 300
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 false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common stock
Trading Symbol VXRT
Security Exchange Name NASDAQ
Entity, Emerging Growth Company false
Amendment Flag false
Entity, Central Index Key 0000072444