NATURE OF BUSINESS (Details Narrative) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of patents, description			Intellicheck continues to develop and release innovative products based upon its rich patent portfolio consisting of nineteen issued patents and four pending patents.
Net loss	$ (1,025,712)	$ (3,009,982)	$ (6,486,322)	$ (3,743,653)
Net cash provided by operating activities			407,331	$ (310,922)
Cash	13,266,031		13,266,031		$ 13,121,392
Working capital	10,835,919		10,835,919
Accumulated deficit	$ 125,905,431		$ 125,905,431		$ 119,419,109