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PROPERTY, PLANT AND EQUIPMENT - Graphite Properties (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) mi² a | Dec. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items] |  |  |
Impairment of uranium properties | $ 5,200,000 | $ 5,200,000 | $ 143,000
Total mineral property expenses |  | $ 2,640,000 | 2,736,000
Coosa Graphite Project |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Area of land | a |  | 45,000 |
Lease term |  | 5 years |
Annual rentals due |  | $ 10,000 |
Optioned lease lands |  | $ 16,179,100 |
Percentage of NSR royalty |  | 2.00% |
Gross area on mineral leases | mi² |  | 70.31 |
Payment at time of completion |  | $ 100,000 |
Additional payment, net smelter return royalty |  | $ 150,000 |
Coosa Graphite Project | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Lease term |  | 70 years |
Percentage of royalties on lease of sales |  | 0.50% |
Maximum net smelter return royalty |  | $ 150,000 |
Rosita Project |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Impairment of uranium properties |  | 1,161,000 |
Cebolleta/Juan Tafoya Property |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Impairment of uranium properties |  | 3,938,000 |
Mineral Property |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Total mineral property expenses |  | $ 2,600,000 | $ 2,700,000

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- Definition Exploration expenses (including prospecting and discontinued operations) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells. + References No definition available. + Details
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