Cover - USD ($)	12 Months Ended
	Dec. 31, 2023	Mar. 15, 2024	Jun. 30, 2023
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Financial Statement Error Correction [Flag]	false
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	false
Amendment Flag	false
Document Period End Date	Dec. 31, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Documents Incorporated by Reference [Text Block]	None
Entity Information [Line Items]
Entity Registrant Name	authID Inc.
Entity Central Index Key	0001534154
Entity File Number	001-40747
Entity Tax Identification Number	46-2069547
Entity Incorporation, State or Country Code	DE
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Public Float			$ 40,795,215
Entity Contact Personnel [Line Items]
Entity Address, Address Line One	1580 North Logan Street
Entity Address, Address Line Two	Suite 660, Unit 51767
Entity Address, City or Town	Denver
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80203
Entity Phone Fax Numbers [Line Items]
City Area Code	516
Local Phone Number	274-8700
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock par value $0.0001 per share
Trading Symbol	AUID
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		9,450,220