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NATURE OF BUSINESS (Details Narrative) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 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 income (loss)	$ 836,162	$ 760,273	$ 5,460,610	$ 733,671
Net cash provided by operating activities			1,075,636	$ 262,313
Cash	11,939,948		11,939,948		$ 13,121,392
Working capital	11,334,550		11,334,550
Accumulated deficit	$ 124,879,719		$ 124,879,719		$ 119,419,109

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