Nature of Business (Details Narrative) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 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	$ (1,060,066)	$ 26,602
Net cash used in operating activities	(471,401)	$ (460,657)
Cash	12,611,616		$ 13,121,392
Working capital	13,405,822
Accumulated deficit	$ (117,436,781)		$ (116,376,715)