Cover - shares	3 Months Ended
	Mar. 31, 2026	May 14, 2026
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Amendment Flag	false
Document Period End Date	Mar. 31, 2026
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q1
Entity Information [Line Items]
Entity Registrant Name	CYNGN INC.
Entity Central Index Key	0001874097
Entity File Number	001-40932
Entity Tax Identification Number	46-2007094
Entity Incorporation, State or Country Code	DE
Current Fiscal Year End Date	--12-31
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	false
Entity Contact Personnel [Line Items]
Entity Address, Address Line One	1344 Terra Bella
Entity Address, City or Town	Mountain View
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94043
Entity Phone Fax Numbers [Line Items]
City Area Code	(650)
Local Phone Number	924-5905
Entity Listings [Line Items]
Title of 12(b) Security	Common stock, $0.00001
Trading Symbol	CYN
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		14,423,281