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SALE OF URANIUM ASSETS - Disposal of Uranium Assets (Details) $ in Thousands | Aug. 30, 2019 USD ($) | Mar. 05, 2019 USD ($) item
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Number of Royalty interests sold | item |  | 4
Asset Purchase Agreement with URC |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Exchange for final payment | $ 1,250 |
Uranium assets | Asset Purchase Agreement with URC |  |
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
Paid at signing |  | $ 500
Cash proceed | $ 1,000 |

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