Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

Document And Entity Information - USD ($)
12 Months Ended
Jul. 31, 2021
Oct. 11, 2021
Jan. 31, 2021
Document Information Line Items      
Entity Registrant Name ENZO BIOCHEM, INC.    
Trading Symbol ENZ    
Document Type 10-K    
Current Fiscal Year End Date --07-31    
Entity Common Stock, Shares Outstanding   48,471,771  
Entity Public Float     $ 126,324,000
Amendment Flag false    
Entity Central Index Key 0000316253    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date Jul. 31, 2021    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Document Annual 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, State or Province NY    
Entity Address, City or Town New York    
Entity Address, Postal Zip Code 10022    
City Area Code (212)    
Local Phone Number 583-0100    
Title of 12(b) Security Common Stock, $.01 par value    
Security Exchange Name NYSE    
Entity Interactive Data Current Yes