Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 18, 2020	Jun. 30, 2019
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, 2019
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business Flag	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 73,324,087
Entity Common Stock, Shares Outstanding		16,209,627
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019