| Document And Entity Information | Apr. 29, 2022 |
| Document Information [Line Items] | |
| Entity, Registrant Name | THE CORETEC GROUP INC. |
| Document, Type | 8-K |
| Document, Period End Date | Apr. 29, 2022 |
| Entity, Incorporation, State or Country Code | OK |
| Entity, File Number | 000-54697 |
| Entity, Tax Identification Number | 73-1479206 |
| Entity, Address, Address Line One | 600 S. Wagner Rd. |
| Entity, Address, City or Town | Ann Arbor |
| Entity, Address, State or Province | MI |
| Entity, Address, Postal Zip Code | 48103 |
| City Area Code | 866 |
| Local Phone Number | 916-0833 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001375195 |
