Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2023	Nov. 08, 2023
Document Information Line Items
Entity Registrant Name	CYNGN INC.
Trading Symbol	CYN
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		41,802,944
Amendment Flag	false
Entity Central Index Key	0001874097
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Sep. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	false
Entity Ex Transition Period	false
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-40932
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-2007094
Entity Address, Address Line One	1015 O’Brien Dr.
Entity Address, City or Town	Menlo Park
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94025
City Area Code	(650)
Local Phone Number	924-5905
Title of 12(b) Security	Common stock, $0.00001
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes