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RELATED PARTY TRANSACTIONS (Details) - USD ($) | 1 Months Ended | 3 Months Ended
--- | --- | ---
Jun. 30, 2016 | Mar. 31, 2020 | Mar. 31, 2019
Related Party Transaction [Line Items] |  |  |
Royalty percentage of minerals recovered sold under minimum price threshold | 3.125% |  |
Mineral price per pound, low range | $ 65.00 |  |
Royalty percentage of minerals recovered sold between price thresholds | 6.25% |  |
Mineral price per pound, upper range | $ 95.00 |  |
Royalty percentage of minerals recovered sold above maximum price threshold | 7.50% |  |
Director |  |  |
Related Party Transaction [Line Items] |  |  |
Equity method, ownership percentage |  | 81.00% |
Proceeds from contributed capital |  | $ 133,000 | $ 0
Leoncito Project, L.L.C. | Director |  |  |
Related Party Transaction [Line Items] |  |  |
Testing permit and lease option agreement, accrued liability |  | $ 140,000 |
United Nuclear | Director |  |  |
Related Party Transaction [Line Items] |  |  |
Equity method, ownership percentage |  | 19.00% |

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