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PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES (Tables) | 12 Months Ended
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Dec. 31, 2019
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 | 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 plant and equipment:
| December 31, 2019 |  | December 31, 2018
| Cost |  | Accumulated Depreciation |  | Net Book Value |  | Cost |  | Accumulated Depreciation |  | Net Book Value
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |
Nichols Ranch | $ | 29,210 |  |  | $ | (14,115 | ) |  | $ | 15,095 |  |  | $ | 29,210 |  |  | $ | (12,021 | ) |  | $ | 17,189 |
Alta Mesa | 13,626 |  |  | (3,179 | ) |  | 10,447 |  |  | 13,656 |  |  | (2,319 | ) |  | 11,337 |
Equipment and other | 12,900 |  |  | (12,239 | ) |  | 661 |  |  | 13,444 |  |  | (12,127 | ) |  | 1,317 |
Property, plant and equipment total | $ | 55,736 |  |  | $ | (29,533 | ) |  | $ | 26,203 |  |  | $ | 56,310 |  |  | $ | (26,467 | ) |  | $ | 29,843 |
Schedule of Summary of Mineral Properties | The following is a summary of mineral properties:
| December 31, 2019 |  | December 31, 2018
Mineral properties |  |  |
Uranerz ISR properties (a) | $ | 25,974 |  |  | $ | 25,974 |
Sheep Mountain | 34,183 |  |  | 34,183 |
Roca Honda | 22,095 |  |  | 22,095 |
Other (a) | 1,287 |  |  | 1,287 |
Mineral properties total | $ | 83,539 |  |  | $ | 83,539 |
a) | In the years ended December 31, 2019 and December 31, 2018, the Company renewed all mineral leases and therefore did not record abandonment expense in the statement of operations. In the year ended December 31, 2017, the Company did not renew certain mineral leases and recorded abandonment expense of $0.29 million.

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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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