| Cover Page - USD ($) $ in Millions | 12 Months Ended | ||
| Dec. 31, 2021 | Mar. 10, 2022 | Jun. 30, 2021 | |
| Entity Listings [Line Items] | |||
| Document Type | 10-K/A | ||
| Document Annual Report | true | ||
| Current Fiscal Year End Date | --12-31 | ||
| Document Transition Report | false | ||
| Document Period End Date | Dec. 31, 2021 | ||
| Entity Registrant Name | ENERGY FUELS INC. | ||
| Entity File Number | 001-36204 | ||
| Entity Incorporation, State or Country Code | Z4 | ||
| Entity Tax Identification Number | 98-1067994 | ||
| Entity Address, Address Line One | 225 Union Blvd., Suite 600 | ||
| Entity Address, State or Province | CO | ||
| Entity Address, City or Town | Lakewood, | ||
| Entity Address, Postal Zip Code | 80228 | ||
| City Area Code | 303 | ||
| Local Phone Number | 974-2140 | ||
| Entity Interactive Data Current | Yes | ||
| Entity Filer Category | Large Accelerated Filer | ||
| Entity Small Business | false | ||
| Entity Emerging Growth Company | false | ||
| Entity Well-known Seasoned Issuer | No | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | Yes | ||
| Title of 12(b) Security | Common Shares, no par value | ||
| ICFR Auditor Attestation Flag | true | ||
| Entity Shell Company | false | ||
| Entity Public Float | $ 886.2 | ||
| Entity Common Stock, Shares Outstanding (in shares) | 156,707,285 | ||
| Document Fiscal Year Focus | 2021 | ||
| Document Fiscal Period Focus | FY | ||
| Entity Central Index Key | 0001385849 | ||
| Amendment Flag | true | ||
| Amendment Description | Energy Fuels Inc. (the “Company” or “Energy Fuels”) is filing this Amendment No. 1 (the “Amendment”) to our Annual Report on Form 10-K for the fiscal year ended December 31, 2021, which was filed on March 15, 2022 (the “Form 10-K”), to provide financial statements for Virginia Energy Resources Inc. (“Virginia Energy”), pursuant to Rule 3-09 of Regulation S-X as at December 31, 2021 and 2020 and for the years ended December 31, 2021, 2020 and 2019. Virginia Energy was significant under Rule 3-09 for the year ended December 31, 2021, but not for the years ended December 31, 2020 or 2019. As a result, under Rule 3-09, we have included in this Amendment audited Virginia Energy financial statements as at December 31, 2021 and 2020, and for the years ended December 31, 2021, 2020, and 2019. In accordance with Rule 3-09(b), the financial statements of Virginia Energy are being filed as an amendment to the Form 10-K as Exhibit 99.1 included in Part IV, Item 15 of this filing. Except as otherwise expressly noted, this Amendment does not modify or update in any way (i) the consolidated financial position, the results of operations or cash flows of the Company, or (ii) the disclosures in or exhibits to the Form 10-K; nor does it reflect events occurring after the filing of the Form 10-K. Among other things, forward-looking statements made in the Form 10-K have not been revised to reflect events that occurred or facts that became known to us after the filing of the Form 10-K, and such forward-looking statements should be read in their historical context. Furthermore, this Amendment should be read in conjunction with the Form 10-K and any subsequent filings with the Securities and Exchange Commission. | ||
| NEW YORK STOCK EXCHANGE, INC. | |||
| Entity Listings [Line Items] | |||
| Trading Symbol | UUUU | ||
| Security Exchange Name | NYSEAMER | ||
| TORONTO STOCK EXCHANGE | |||
| Entity Listings [Line Items] | |||
| Title of 12(b) Security | Common Shares, no par value |
| Audit Information | 12 Months Ended |
| Dec. 31, 2021 | |
| Audit Information [Abstract] | |
| Auditor Name | Smythe LLP |
| Auditor Location | Vancouver BC |
| Auditor Firm ID | 995 |
