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DISCONTINUED OPERATIONS - Cash flow information (Details) - Uranium And Lithium Operations $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Depreciation and amortization | $ 38
Capital expenditures | 81
Accretion of asset retirement obligations | 201
Impairment of uranium properties | $ 5,200

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