| Cover | Mar. 21, 2024 | Mar. 21, 2023 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Mar. 21, 2024 | |
| Entity Registrant Name | Intellicheck, Inc. | |
| Entity Incorporation, State or Country Code | DE | |
| Entity File Number | 001-15465 | |
| 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 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Title of 12(b) Security | Common Stock, $.001 par value | |
| Trading Symbol | IDN | |
| Security Exchange Name | NASDAQ | |
| Entity Emerging Growth Company | false | |
| Amendment Flag | false | |
| Entity Central Index Key | 0001040896 |
