Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Jul. 30, 2021
Document Information Line Items
Entity Registrant Name	IMMUCELL CORP /DE/
Trading Symbol	ICCC
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		7,741,864
Amendment Flag	false
Entity Central Index Key	0000811641
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Jun. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Quarterly Report	true
Entity File Number	001-12934
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	01-0382980
Entity Address, Address Line One	56 Evergreen Drive
Entity Address, City or Town	Portland
Entity Address, State or Province	ME
Entity Address, Postal Zip Code	04103
City Area Code	(207)
Local Phone Number	878-2770
Title of 12(b) Security	None
Entity Interactive Data Current	Yes
Document Transition Report	false
Security Exchange Name	NASDAQ