RELATED PARTY TRANSACTIONS	12 Months Ended
RELATED PARTY TRANSACTIONS	Dec. 31, 2022
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS On May 17, 2017, the Board of Directors of the Company appointed Robert W. Kirkwood and Benjamin Eshleman III to the Board of Directors of the Company. Mr. Kirkwood is a principal of the Kirkwood Companies, including Kirkwood Oil and Gas LLC, Wesco Operating, Inc., and United Nuclear LLC (“United Nuclear”). United Nuclear owns a 19% interest in the Company’s Arkose Mining Venture while the Company owns the remaining 81%. The Company acts as manager of the Arkose Mining Venture and has management and control over operations carried out by the Arkose Mining Venture. The Arkose Mining Venture is a contractual joint venture governed by a venture agreement dated as of January 15, 2008 and entered into by Uranerz Energy Corporation, a wholly owned, indirectly held subsidiary of the Company (“Uranerz”) and United Nuclear (the “Venture Agreement”). United Nuclear contributed $0.13 million, $0.31 million and $0.13 million to the expenses of the Arkose Joint Venture based on the approved budget for the years ended December 31, 2022, 2021 and 2020, respectively. On June 1, 2022, Uranerz renewed for a third year its Casper, Wyoming-based Office Lease Agreement with Metro, Inc. where Mr. Kirkwood acts as General Manager. Consistent with the prior year's lease, the term is for a period of 12 months with rent in the amount of $15,000 paid in $1,250 monthly increments. The original Office Lease Agreement was entered into by the parties on June 1, 2020, for a period of 12 months, with rent paid in monthly increments of $1,000; an amendment effective October 1, 2020 increased the rent to $1,250 monthly for the remainder of the original lease term, for a total of $15,000 paid. Mr. Benjamin Eshleman III is President of Mesteña LLC, which became a shareholder of the Company through the Company’s acquisition of Mesteña Uranium, L.L.C (now Alta Mesa LLC) and certain of its affiliates (collectively, the “Acquired Companies”) in June 2016. Pursuant to the purchase agreement, the Alta Mesa Properties held by the Acquired Companies are subject to a royalty of 3.125% of the value of the recovered U3O8 from the Alta Mesa Properties sold at a price of $65.00 per pound or less, 6.25% of the value of the recovered U3O8 from the Alta Mesa Properties sold at a price greater than $65.00 per pound up to and including $95.00 per pound, and 7.5% of the value of the recovered U3O8 from the Alta Mesa Properties sold at a price greater than $95.00 per pound. The royalties are held by Mr. Eshleman and his extended family. In addition, Mr. Eshleman and certain members of his extended family are parties to surface use agreements that entitle them to surface use payments from the Acquired Companies in certain circumstances. No royalty payments were made during the years ended December 31, 2022, 2021 and 2020. The Company paid $0.3 million, $0.3 million and $0.4 million, for surface use payments to Mr. Eshleman and his immediate family members for the years ended December 31, 2022, 2021 and 2020, respectively. The Alta Mesa Properties included yellowcake slurry inventory contained in resin bids for which the Company owed Mesteña LLC $0.18 million as of December 31, 2022 if this inventory was processed. The Company sold its Alta Mesa Project to enCore on February 14, 2023, at which time Mr. Eshleman ceased to be a related party. Upon closing of the sale of the Alta Mesa Project, enCore paid Mesteña LLC $0.18 million. See Note 18 – Subsequent Events for more information. On October 27, 2021, the Company began providing services to CUR under a mine operating agreement. See Note 7 – Property, Plant and Equipment and Mineral Properties for more information. The Company earned approximately $0.45 million during the year ended December 31, 2022, with approximately $0.08 million due from CUR as of December 31, 2022. The Company provided no services to CUR under the toll milling agreement during the year ended December 31, 2021.