| Cover | May 24, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 24, 2022 |
| Entity File Number | 0-53482 |
| Entity Registrant Name | Texas Mineral Resources Corp. |
| Entity Central Index Key | 0001445942 |
| Entity Tax Identification Number | 87-0294969 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 539 El Paso Street |
| Entity Address, City or Town | Sierra Blanca |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 79851 |
| City Area Code | (361) |
| Local Phone Number | 790-5831 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | TMRC |
| Entity Emerging Growth Company | false |
