Document And Entity Information - shares	9 Months Ended
	Apr. 30, 2023	Jun. 05, 2023
Document Information Line Items
Entity Registrant Name	ENZO BIOCHEM INC
Trading Symbol	ENZ
Document Type	10-Q
Current Fiscal Year End Date	--07-31
Entity Common Stock, Shares Outstanding		49,728,084
Amendment Flag	false
Entity Central Index Key	0000316253
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Document Period End Date	Apr. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-09974
Entity Incorporation, State or Country Code	NY
Entity Tax Identification Number	13-2866202
Entity Address, Address Line One	81 Executive Blvd
Entity Address, Address Line Two	Suite 3 Farmingdale
Entity Address, State or Province	NY
Entity Address, City or Town	New York
Entity Address, Postal Zip Code	11735
Local Phone Number	583-0100
City Area Code	212
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common stock $0.01 par
Security Exchange Name	NYSE