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ACQUISITIONS AND DISPOSALS - Disposal of Uranium Assets (Details) $ in Thousands			12 Months Ended
	Aug. 30, 2019 USD ($)	Mar. 05, 2019 USD ($) item	Dec. 31, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Royalty interests sold | item		4
Exchange for final payment	$ 1,250
Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Borrowings		$ 2,000
Total cash consideration of disposal		2,750
Deposit for sale of assets		$ 500
Cash proceed			$ 1,000

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585

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Borrowing amount classified as assets attributable to disposal group held for sale or disposed of.

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The cash inflow from disposal of mineral properties and promissory note.

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