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PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES (Tables) | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
Schedule of Property, Plant and Equipment | Where straight-line depreciation is utilized, the range of useful lives for various asset classes is generally as follows:
Buildings | 12 - 15 years
Shop tools and equipment | 3 - 5 years
Mining equipment | 5 years
Office equipment | 4 - 5 years
Furniture and fixtures | 5 - 7 years
Light trucks and utility vehicles | 5 years
The following is a summary of property, plant and equipment:
| December 31, 2020 |  | December 31, 2019
| Cost |  | Accumulated Depreciation |  | Net Book Value |  | Cost |  | Accumulated Depreciation |  | Net Book Value
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |
Nichols Ranch | $ | 29,210 |  |  | $ | (16,150) |  |  | $ | 13,060 |  |  | $ | 29,210 |  |  | $ | (14,115) |  |  | $ | 15,095 |
Alta Mesa | 13,626 |  |  | (4,088) |  |  | 9,538 |  |  | 13,626 |  |  | (3,179) |  |  | 10,447 |
Equipment and other | 13,528 |  |  | (12,505) |  |  | 1,023 |  |  | 12,900 |  |  | (12,239) |  |  | 661 |
Property, plant and equipment total | $ | 56,364 |  |  | $ | (32,743) |  |  | $ | 23,621 |  |  | $ | 55,736 |  |  | $ | (29,533) |  |  | $ | 26,203 |
Schedule of Summary of Mineral Properties | The following is a summary of mineral properties:
| December 31, 2020 |  | December 31, 2019
Mineral properties |  |  |
Uranerz ISR properties | $ | 25,974 |  |  | $ | 25,974 |
Sheep Mountain | 34,183 |  |  | 34,183 |
Roca Honda | 22,095 |  |  | 22,095 |
Other | 1,287 |  |  | 1,287 |
Mineral properties total | $ | 83,539 |  |  | $ | 83,539 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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