v3.26.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2026
May 08, 2026
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2026  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Entity Registrant Name Coya Therapeutics, Inc.  
Entity Central Index Key 0001835022  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Security12b Title Common Stock, par value $0.0001 per share  
Trading Symbol COYA  
Security Exchange Name NASDAQ  
Entity File Number 001-41583  
Entity Incorporation State Country Code DE  
Entity Tax Identification Number 85-4017781  
Entity Address Address Line1 5850 San Felipe St., Suite 500  
Entity Address City Or Town Houston  
Entity Address State Or Province TX  
Entity Address Postal Zip Code 77057  
City Area Code 800  
Local Phone Number 587-8170  
Document Quarterly Report true  
Document Transition Report false  
Entity Common Stock, Shares Outstanding   23,457,183