| Document And Entity Information | Jun. 20, 2023 |
| Document Information [Line Items] | |
| Entity, Registrant Name | SCANDIUM INTERNATIONAL MINING CORP. |
| Document, Type | 8-K |
| Document, Period End Date | Jun. 20, 2023 |
| Entity, File Number | 000-54416 |
| Entity, Incorporation, State or Country Code | Z4 |
| Entity, Tax Identification Number | 98-1009717 |
| Entity, Address, Address Line One | 1390 Ione Pass Trail |
| Entity, Address, City or Town | Reno |
| Entity, Address, State or Province | NV |
| Entity, Address, Postal Zip Code | 89523 |
| City Area Code | 775 |
| Local Phone Number | 355-9500 |
| 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 | 0001408146 |
