DISCONTINUED OPERATIONS - Business segments included in discontinued operations (Details) - Uranium And Lithium Operations - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Mineral property expenses	$ (752)	$ (1,924)
General and administrative expenses	(405)	(1,273)
Accretion of asset retirement obligations	(32)	(170)
Depreciation and amortization	(30)	(36)
Impairment of uranium properties	(5,200)	(5,200)
Other income (expense)	30	30
Net Loss from Discontinued Operations	$ (6,389)	$ (8,573)

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

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