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Cover - USD ($)
 12 Months Ended
Dec. 31, 2023
Apr. 01, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-15465    
Entity Registrant Name Intellicheck, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 11-3234779    
Entity Address, Address Line One 200 Broadhollow Road    
Entity Address, Address Line Two Suite 207    
Entity Address, City or Town Melville    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 11747    
City Area Code (516)    
Local Phone Number 992-1900    
Title of 12(b) Security Common Stock, $0.001 par value    
Trading Symbol IDN    
Security Exchange Name NASDAQ    
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 true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 38,160,104
Entity Common Stock, Shares Outstanding   19,404,561  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE: Portions of Intellicheck, Inc.’s definitive Proxy Statement for its 2024 Annual Meeting of Shareholders to be filed with the U.S. Securities and Exchange Commission pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended, are incorporated by reference into Part III of this Annual Report on Form 10-K.
    
Entity Central Index Key 0001040896    
Document Fiscal Period Focus FY    
Amendment Flag false    
Document Fiscal Year Focus 2023