Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

Document And Entity Information - shares
3 Months Ended
Oct. 31, 2018
Dec. 02, 2019
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   47,556,807
Amendment Flag false  
Entity Central Index Key 0000316253  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Document Period End Date Oct. 31, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
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 527 Madison Ave  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10022  
City Area Code (212)  
Local Phone Number 583-0100  
Entity Interactive Data Current Yes  
Title of 12(b) Security Common stock $0.01 par  
Security Exchange Name NYSE