| Document And Entity Information - USD ($) | 12 Months Ended | ||
| Sep. 30, 2024 | Dec. 11, 2024 | Mar. 31, 2024 | |
| Document Information [Line Items] | |||
| Entity, Registrant Name | EDESA BIOTECH, INC. | ||
| Current Fiscal Year End Date | --09-30 | ||
| Document, Fiscal Period Focus | FY | ||
| Document, Fiscal Year Focus | 2024 | ||
| Document, Type | 10-K/A | ||
| Document, Annual Report | true | ||
| Document, Period End Date | Sep. 30, 2024 | ||
| Document, Transition Report | false | ||
| Entity, File Number | 001-37619 | ||
| Entity, Incorporation, State or Country Code | Z4 | ||
| Entity, Address, Address Line One | 100 Spy Court | ||
| Entity, Address, City or Town | Markham | ||
| Entity, Address, State or Province | ON | ||
| Entity, Address, Country | CA | ||
| Entity, Address, Postal Zip Code | L3R 5H6 | ||
| City Area Code | 289 | ||
| Local Phone Number | 800-9600 | ||
| Title of 12(b) Security | Common Shares, without par value | ||
| Trading Symbol | EDSA | ||
| Security Exchange Name | NASDAQ | ||
| Entity, Well-known Seasoned Issuer | No | ||
| Entity, Voluntary Filers | No | ||
| Entity, Current Reporting Status | Yes | ||
| Entity, Interactive Data, Current | Yes | ||
| Entity, Filer Category | Non-accelerated Filer | ||
| Entity, Small Business | true | ||
| Entity, Emerging Growth Company | false | ||
| ICFR Auditor Attestation Flag | false | ||
| Document, Financial Statement Error Correction Flag | false | ||
| Entity, Shell Company | false | ||
| Entity, Public Float | $ 11,056,198 | ||
| Entity, Common Stock Shares, Outstanding | 3,467,658 | ||
| Amendment Description | Edesa Biotech, Inc. (the “Company”) is filing this Amendment No. 1 on Form 10-K/A (this “Amendment No. 1”) to its Annual Report on Form 10-K for the fiscal year ended September 30, 2024 (the “Original Report”), as filed with the Securities and Exchange Commission (the “SEC”) on December 13, 2024, in order to amend “Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.” The revisions to “Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters” are solely to disclose an additional shareholder as owning more than 5% or more of our common shares. Correspondingly, “Item 15. Exhibits and Financial Statement Schedules” has been restated to include the required certifications by the Company’s principal executive officer and principal financial officer, which are included as Exhibits 31.3 and 31.4, respectively. Paragraphs 3, 4 and 5 of Exhibits 31.3 and 31.4 have been omitted in accordance with the SEC’s rules and guidance. Additionally, this Amendment No. 1 does not include the certifications under Section 906 of the Sarbanes-Oxley Act of 2002 as no financial statements are being filed with this Amendment No. 1. Except as described above, this Amendment No. 1 does not modify or update disclosure in, or exhibits to, the Original Report. Furthermore, this Amendment No. 1 does not change any previously reported financial results, nor does it reflect events occurring after the date of the Original Report. Information not affected by this Amendment No. 1 remains unchanged and reflects the disclosures made at the time the Original Report was made. Accordingly, this Amendment No. 1 should be read in conjunction with the Original Report and the Company’s other filings with the SEC. | ||
| Amendment Flag | true | ||
| Entity, Central Index Key | 0001540159 |
