DISCONTINUED OPERATIONS - Business segments included in discontinued operations (Details) - Uranium And Lithium Operations $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Mineral property expenses	$ (2,606)
General and administrative expenses	(1,665)
Accretion of asset retirement obligations	(201)
Depreciation and amortization	(38)
Impairment of uranium properties	(5,200)
Other income	48
Net Loss from Discontinued Operations	$ (9,662)

Amount of deprecation and amortization expense attributable to property, plant and equipment and intangible assets of discontinued operations.

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Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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Amount of impairment expenses attributable to discontinued operations.

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