| Cover | Jun. 29, 2022 |
| Cover [Abstract] | |
| Entity Registrant Name | SCANDIUM INTERNATIONAL MINING CORP. |
| Entity Central Index Key | 0001408146 |
| Document Type | 8-K |
| Amendment Flag | false |
| Entity Emerging Growth Company | false |
| Document Period End Date | Jun. 29, 2022 |
| Entity File Number | 000-54416 |
| City Area Code | 775 |
| Local Phone Number | 355-9500 |
| Entity Address Address Line 1 | 1390 Ione Pass Trail |
| Entity Address City Or Town | Reno |
| Entity Address State Or Province | NV |
| Entity Address Postal Zip Code | 89523 |
| Entity Tax Identification Number | 98-1009717 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Incorporation State Country Code | Z4 |
