v3.25.2
Cover - shares
6 Months Ended
Jun. 30, 2025
Jul. 28, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-36751  
Entity Registrant Name OCUGEN, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 04-3522315  
Entity Address, Address Line One 11 Great Valley Parkway  
Entity Address, City or Town Malvern  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19355  
City Area Code 484  
Local Phone Number 328-4701  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol OCGN  
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 false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   292,304,736
Entity Central Index Key 0001372299  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false