| Cover | Oct. 05, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 5, 2020 |
| Entity File Number | 001-39437 |
| Entity Registrant Name | Corvus Gold Inc. |
| Entity Central Index Key | 0001507964 |
| Entity Tax Identification Number | 98-0668473 |
| Entity Incorporation, State or Country Code | A1 |
| Entity Address, Address Line One | Suite 1750 |
| Entity Address, Address Line Two | 700 West Pender Street |
| Entity Address, City or Town | Vancouver |
| Entity Address, State or Province | BC |
| Entity Address, Postal Zip Code | V6C 1G8 |
| City Area Code | (604) |
| Local Phone Number | 638-3246 |
| 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 | KOR |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
