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PLANT AND EQUIPMENT AND MINERAL PROPERTIES | 9 Months Ended
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Sep. 30, 2021
Property, Plant and Equipment [Abstract] |
Plant and Equipment and Mineral Properties | PLANT AND EQUIPMENT AND MINERAL PROPERTIES The following is a summary of property, plant and equipment:
| September 30, 2021 |  | December 31, 2020
| Cost |  | Accumulated Depreciation |  | Net Book Value |  | Cost |  | Accumulated Depreciation |  | Net Book Value
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |
Nichols Ranch | $ | 29,210 |  |  | $ | (17,677) |  |  | $ | 11,533 |  |  | $ | 29,210 |  |  | $ | (16,150) |  |  | $ | 13,060 |
Alta Mesa | 13,626 |  |  | (4,769) |  |  | 8,857 |  |  | 13,626 |  |  | (4,088) |  |  | 9,538 |
Equipment and other | 14,481 |  |  | (12,660) |  |  | 1,821 |  |  | 13,528 |  |  | (12,505) |  |  | 1,023 |
Property, plant and equipment total | $ | 57,317 |  |  | $ | (35,106) |  |  | $ | 22,211 |  |  | $ | 56,364 |  |  | $ | (32,743) |  |  | $ | 23,621 |
The following is a summary of mineral properties:
| September 30, 2021 |  | December 31, 2020
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 The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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