| Cover | Aug. 03, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | UR-ENERGY INC. |
| Entity Central Index Key | 0001375205 |
| Document Type | 8-K |
| Amendment Flag | false |
| Entity Emerging Growth Company | false |
| Document Period End Date | Aug. 3, 2021 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Incorporation State Country Code | Z4 |
| Entity File Number | 001-33905 |
| Entity Address Address Line 1 | 10758 W Centennial Road |
| Entity Address Address Line 2 | Suite 200 |
| Entity Address City Or Town | Littleton |
| Entity Address State Or Province | CO |
| Entity Address Postal Zip Code | 80127 |
| City Area Code | 720 |
| Local Phone Number | 981-4588 |
| Security 12b Title | Common Stock |
| Trading Symbol | URG |
| Security Exchange Name | NYSE |
