Cover - shares	6 Months Ended
	Jun. 30, 2023	Aug. 14, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Entity File Number	001-15465
Entity Registrant Name	Intellicheck, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	11-3234779
Entity Address, Address Line One	200 Broadhollow Road
Entity Address, Address Line Two	Suite 207
Entity Address, City or Town	Melville
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11747
City Area Code	(516)
Local Phone Number	992-1900
Title of 12(b) Security	Common stock, $0.001 par value per share
Trading Symbol	IDN
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		19,297,523
Amendment Flag	false
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2023
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0001040896