| Document And Entity Information - USD ($) | 12 Months Ended | ||
| Jul. 31, 2023 | Nov. 21, 2023 | Jan. 31, 2023 | |
| Document Information Line Items | |||
| Entity Registrant Name | Enzo Biochem, Inc. | ||
| Trading Symbol | ENZ | ||
| Document Type | 10-K/A | ||
| Current Fiscal Year End Date | --07-31 | ||
| Entity Common Stock, Shares Outstanding | 50,489,771 | ||
| Entity Public Float | $ 56,384,000 | ||
| Amendment Flag | true | ||
| Amendment Description | Enzo Biochem, Inc. (the “Company”) is filing this Amendment No. 1 to Form 10-K on Form 10-K/A (this “Form 10-K/A”) for the fiscal year ended July 31, 2023, in order to amend and restate Part III, Items 10 through 14 of the report on Form 10-K (the “original Form 10-K”) that we originally filed with the Securities and Exchange Commission (the “SEC”) on November 3, 2023.This Form 10-K/A has been prepared and filed in reliance on General Instruction G to Form 10-K, which provides that registrants may provide the information required by Part III in a definitive proxy statement or an amendment to the Form 10-K filed with the SEC within 120 days after the end of the fiscal year covered by the report. The Company had initially planned to file the Part III information in a definitive proxy statement.The original Form 10-K is therefore amended to (i) delete the reference on the cover of the original Form 10-K to the incorporation by reference of a definitive proxy statement into Part III of such Form 10-K and (ii) revise Part III, Items 10 through 14 of the Company’s original Form 10-K to include information previously omitted from the original Form 10-K.Except as described above, no other changes have been made to the original Form 10-K. The original Form 10-K continues to speak as of November 3, 2023, the date the Company filed the original Form 10-K with the SEC, and other than as expressly indicated in the original Form 10-K or in this Form 10-K/A, the Company has not updated the disclosures contained therein to reflect any events that have occurred at a date subsequent to November 3, 2023. Accordingly, this Form 10-K/A should be read in conjunction with the original Form 10-K and the Company’s other reports filed thereafter. | ||
| 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, 2023 | ||
| Document Fiscal Year Focus | 2023 | ||
| Document Fiscal Period Focus | FY | ||
| Entity Small Business | true | ||
| Entity Emerging Growth Company | false | ||
| Entity Shell Company | false | ||
| ICFR Auditor Attestation Flag | false | ||
| Document Annual Report | true | ||
| Document Transition Report | false | ||
| Entity File Number | 001-09974 | ||
| Entity Incorporation, State or Country Code | NY | ||
| Entity Address, City or Town | New York | ||
| 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, Postal Zip Code | 11735 | ||
| City Area Code | (631) | ||
| Local Phone Number | 755-5500 | ||
| Title of 12(b) Security | Common Stock, $.01 par value | ||
| Security Exchange Name | NYSE | ||
| Entity Interactive Data Current | Yes | ||
| Document Financial Statement Error Correction [Flag] | false | ||
| Auditor Name | EISNERAMPER LLP | ||
| Auditor Location | Iselin, New Jersey | ||
| Auditor Firm ID | 274 |
