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DISCONTINUED OPERATIONS - Business segments included in discontinued operations (Details) - Uranium And Lithium Operations - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Mineral property expenses | $ (570) | $ (1,172)
General and administrative expenses | (433) | (850)
Accretion of asset retirement obligations | (32) | (138)
Depreciation and amortization | (15) | (26)
Other income (expense) | 19 | 30
Net Loss from Discontinued Operations | $ (1,031) | $ (2,156)

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