ACQUISITIONS AND DISPOSALS - Disposal of Uranium Assets (Details) - Uranium assets - URC $ in Thousands	Aug. 30, 2019 USD ($)	Jun. 28, 2019 USD ($)	Mar. 05, 2019 USD ($) item
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Royalty interests sold | item			4
Borrowings			$ 2,000
Consideration received	$ 1,250	$ 1,000	2,750
Paid at signing			$ 500