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Cover
Nov. 03, 2022
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Nov. 03, 2022
Entity File Number 001-39608
Entity Registrant Name INTRUSION INC.
Entity Central Index Key 0000736012
Entity Tax Identification Number 75-1911917
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 101 East Park Blvd
Entity Address, Address Line Two Suite 1200
Entity Address, City or Town Plano
Entity Address, State or Province TX
Entity Address, Postal Zip Code 75074
City Area Code (972)
Local Phone Number 234-6400
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.01 par value per share
Trading Symbol INTZ
Security Exchange Name NASDAQ
Entity Emerging Growth Company false