v3.26.1
Document And Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Aug. 13, 2026
Document Information Line Items    
Entity Central Index Key 0001874097  
Document Type 10-Q/A  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Fiscal Year Focus 2026  
Document Transition Report false  
Entity File Number 001-40932  
Entity Registrant Name CYNGN INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 46-2007094  
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  
City Area Code (650)  
Local Phone Number 924-5905  
Title of 12(b) Security Common stock, $0.00001  
Trading Symbol CYN  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   14,423,281
Amendment Description This Amendment No. 1 on Form 10-Q/A (this “Amendment”) amends the Quarterly Report on Form 10-Q of Cyngn Inc. (the “Company”) for the quarter ended June 30, 2026, originally filed with the U.S. Securities and Exchange Commission (the “SEC”) on August 13, 2026 (the “Original Filing”).This Amendment is being filed to revise Part II “Item 6. Exhibits” to include Exhibit 10.3 which were inadvertently omitted from the Original Filing.Other than as expressly set forth herein, this Amendment does not, and does not purport to, amend, update or restate the information in the Original Filing or reflect any events that have occurred after the Original Filing was made. Information not affected by this Amendment remains unchanged and reflects the disclosures made at the time as of which the Original Filing was made. This Amendment should be read together with the Original Filing and the Company’s other filings with the SEC.  
Amendment Flag true  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31