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THE COMPANY AND DESCRIPTION OF BUSINESS	12 Months Ended
THE COMPANY AND DESCRIPTION OF BUSINESS	Dec. 31, 2020
Accounting Policies [Abstract]
The Company and Description of Business	THE COMPANY AND DESCRIPTION OF BUSINESS Energy Fuels Inc. was incorporated under the laws of the Province of Alberta and was continued under the Business Corporations Act (Ontario). Energy Fuels Inc. and its subsidiary companies (collectively “the Company” or “EFI”) are engaged in uranium extraction, recovery and sales of uranium from mineral properties and the recycling of uranium bearing materials generated by third parties. As a part of these activities the Company also acquires, explores, evaluates and, if warranted, permits uranium properties. The Company’s final uranium product, uranium oxide concentrates (“U3O8” or “uranium concentrates”), is sold to customers for further processing into fuel for nuclear reactors. The Company also produces vanadium, along with uranium at its White Mesa Mill from certain of its Colorado Plateau properties, as market conditions warrant and from time to time from solutions in its Mill tailings impoundment system. The Company also expects to commence commercial production of rare earth element carbonate (“REEs”) at the White Mesa Mill in 2021. The Company is an exploration stage mining company as defined by the United States (“U.S.”) Securities and Exchange Commission (“SEC”) Industry Guide 7 (“SEC Industry Guide 7”), as it has not established the existence of proven or probable reserves on any of its properties. Beginning with its annual report on Form 10-K for the year ended December 31, 2021, the Company will report its mineral holdings in accordance with the SEC’s Subpart 1300 of Regulation S-K. Energy Fuels is engaged in conventional and in-situ (“ISR”) uranium extraction and recovery, along with the exploration, permitting and evaluation of uranium properties in the United States. Mining activities Mining activities consist of a stand-alone uranium recovery facility (the “White Mesa Mill”), conventional mining projects and two ISR mining projects (complete with two ISR recovery facilities on standby and two wellfields). The conventional projects are located at the Colorado Plateau, Henry Mountains, Arizona Strip, and Roca Honda Projects, all of which are in the vicinity of the White Mesa Mill, in addition to the Sheep Mountain Project located in Wyoming. ISR projects include the Nichols Ranch Project (which includes the Jane Dough Property and the Hank Satellite Plant) located in Wyoming and the Alta Mesa ISR Project (the “Alta Mesa Project”) located in Texas, both of which are on standby. At December 31, 2020, other than evaluation work and infrastructure improvements and development at the Company’s Pinyon Plain Project, the conventional mining projects in the vicinity of the White Mesa Mill and Sheep Mountain are on standby, and are being evaluated for continued mining activities and/or are in the process of being permitted. The White Mesa Mill has completed its most recent vanadium campaign, continues to process third-party uranium-bearing mineralized materials from mining and recycling activities, such as the Mill’s alternate feed program, and continues to pursue its U.S.-based REE initiatives.