Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Mar. 21, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	Intellicheck, Inc.
Entity Central Index Key	0001040896
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filer	No
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business Flag	true
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Public Float			$ 288,333,510
Entity Common Stock, Shares Outstanding		15,638,765
Trading Symbol	IDN
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2018