v3.25.3

Cover - shares	9 Months Ended
Cover - shares	Sep. 30, 2025	Oct. 31, 2025
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 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		312,320,112
Entity Central Index Key	0001372299
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q3
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Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

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Local phone number for entity.

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Ocugen, Inc. 10-Q