| Cover | Mar. 30, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 30, 2021 |
| Entity File Number | 001-34673 |
| Entity Registrant Name | CORMEDIX INC. |
| Entity Central Index Key | 0001410098 |
| Entity Tax Identification Number | 20-5894890 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 300 Connell Drive |
| Entity Address, Address Line Two | Suite 4200 |
| Entity Address, City or Town | Berkeley Heights |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07922 |
| City Area Code | (908) |
| Local Phone Number | 517-9500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, $0.001 par value |
| Trading Symbol | CRMD |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
