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. 01, 2018
Document and Entity Information [Abstract]    
Entity Registrant Name ENZO BIOCHEM INC  
Document Type 10-Q  
Current Fiscal Year End Date --07-31  
Entity Common Stock, Shares Outstanding   47,192,429
Amendment Flag false  
Entity Central Index Key 0000316253  
Entity Filer Category Accelerated Filer  
Document Period End Date Oct. 31, 2018  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Ex Transition Period false