<SEC-DOCUMENT>0001683168-21-003290-index.html : 20210805
<SEC-HEADER>0001683168-21-003290.hdr.sgml : 20210805
<ACCEPTANCE-DATETIME>20210805161641
ACCESSION NUMBER:		0001683168-21-003290
CONFORMED SUBMISSION TYPE:	S-3
PUBLIC DOCUMENT COUNT:		9
FILED AS OF DATE:		20210805
DATE AS OF CHANGE:		20210805

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			INTRUSION INC
		CENTRAL INDEX KEY:			0000736012
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER COMMUNICATIONS EQUIPMENT [3576]
		IRS NUMBER:				751911917
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-258491
		FILM NUMBER:		211148426

	BUSINESS ADDRESS:	
		STREET 1:		101 EAST PARK BLVD, SUITE 1200
		CITY:			PLANO
		STATE:			TX
		ZIP:			75074
		BUSINESS PHONE:		9722346400

	MAIL ADDRESS:	
		STREET 1:		101 EAST PARK BLVD, SUITE 1200
		CITY:			PLANO
		STATE:			TX
		ZIP:			75074

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INTRUSION COM INC
		DATE OF NAME CHANGE:	20000601

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ODS NETWORKS INC
		DATE OF NAME CHANGE:	19970507

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OPTICAL DATA SYSTEMS INC
		DATE OF NAME CHANGE:	19950517
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-3
<SEQUENCE>1
<FILENAME>intz_s3.htm
<DESCRIPTION>FORM S-3
<TEXT>
Document 1 - file: intz_s3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-1.2
<SEQUENCE>2
<FILENAME>intz_ex0102.htm
<DESCRIPTION>SALES AGREEMENT, DATED AUGUST 5, 2021, BETWEEN THE REGISTRANT AND B. RILEY SECURITIES, INC.
<TEXT>
Document 2 - file: intz_ex0102.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.4
<SEQUENCE>3
<FILENAME>intz_ex0404.htm
<DESCRIPTION>FORM OF SENIOR INDENTURE
<TEXT>
Document 3 - file: intz_ex0404.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.5
<SEQUENCE>4
<FILENAME>intz_ex0405.htm
<DESCRIPTION>FORM OF SUBORDINATED INDENTURE
<TEXT>
Document 4 - file: intz_ex0405.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>5
<FILENAME>intz_ex0501.htm
<DESCRIPTION>OPINION OF WILSON SONSINI GOODRICH & ROSATI, PROFESSIONAL CORPORATION
<TEXT>
Document 5 - file: intz_ex0501.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>6
<FILENAME>intz_ex2301.htm
<DESCRIPTION>CONSENT OF WHITLEY PENN LLP, INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
<TEXT>
Document 6 - file: intz_ex2301.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>image_001.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: image_001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>image_002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: image_002.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>image_014.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: image_014.gif

</DOCUMENT>
</SEC-DOCUMENT>