| Cover | May 23, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 23, 2023 |
| Entity File Number | 001-33638 |
| Entity Registrant Name | INTERNATIONAL TOWER HILL MINES LTD. |
| Entity Central Index Key | 0001134115 |
| Entity Tax Identification Number | 98-0668474 |
| Entity Incorporation, State or Country Code | A1 |
| Entity Address, Address Line One | 2710-200 Granville Street |
| Entity Address, Address Line Two | Vancouver |
| Entity Address, City or Town | Canada |
| Entity Address, State or Province | BC |
| Entity Address, Postal Zip Code | V6C 1S4 |
| City Area Code | 604 |
| Local Phone Number | 683-6332 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Shares, no par value |
| Trading Symbol | THM |
| Security Exchange Name | NYSEAMER |
| Entity Emerging Growth Company | false |
