| Cover | Feb. 12, 2025 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 12, 2025 |
| Current Fiscal Year End Date | --09-30 |
| Entity File Number | 001-37619 |
| Entity Registrant Name | Edesa Biotech, Inc. |
| Entity Central Index Key | 0001540159 |
| Entity Incorporation, State or Country Code | A1 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Shares |
| Trading Symbol | EDSA |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
