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Nature of Business (Details Narrative) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
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 twenty issued patents and five pending.
Net loss	$ 106,000	$ (568,000)	$ (874,000)	$ (1,213,000)	$ (664,000)	$ (1,131,000)	$ (1,101,000)	$ (1,068,000)	$ (2,548,711)	$ (3,963,576)
Net cash used in operating activities									(1,840,850)	(4,220,611)
Cash	3,350,853				4,376,017				3,350,853	4,376,017
Accumulated deficit	$ (116,935,112)				$ (114,386,401)				$ (116,935,112)	$ (114,386,401)

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