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PLANT AND EQUIPMENT AND MINERAL PROPERTIES (Tables) | 3 Months Ended
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Mar. 31, 2017
Property, Plant and Equipment [Abstract] |
Schedule of Property, Plant and Equipment | The following is a summary of plant and equipment:
| March 31, 2017 |  | December 31, 2016
| Cost |  | Accumulated Depreciation |  | Net Book Value |  | Cost |  | Accumulated Depreciation |  | Net Book Value
Plant and equipment |  |  |  |  |  |  |  |  |  |  |
Nichols Ranch | $ | 29,210 |  |  | $ | (7,915 | ) |  | $ | 21,295 |  |  | $ | 29,210 |  |  | $ | (6,804 | ) |  | $ | 22,406 |
Alta Mesa | 13,626 |  |  | (690 | ) |  | 12,936 |  |  | 13,626 |  |  | (456 | ) |  | 13,170 |
Equipment and other | 13,367 |  |  | (11,472 | ) |  | 1,895 |  |  | 13,367 |  |  | (11,361 | ) |  | 2,006 |
Plant and equipment total | $ | 56,203 |  |  | $ | (20,077 | ) |  | $ | 36,126 |  |  | $ | 56,203 |  |  | $ | (18,621 | ) |  | $ | 37,582 |
Schedule of Summary of Mineral Properties | The following is a summary of mineral properties:
| March 31, 2017 |  | December 31, 2016
Mineral properties |  |  |
In-situ recovery ("ISR") |  |  |
Uranerz ISR properties (a) | $ | 34,815 |  |  | $ | 35,060 |
In-situ recovery total | $ | 34,815 |  |  | $ | 35,060 |
Conventional |  |  |
Sheep Mountain | 34,183 |  |  | 34,183 |
Roca Honda | 22,095 |  |  | 22,095 |
Other | 1,287 |  |  | 1,287 |
Conventional total | 57,565 |  |  | 57,565 |
Mineral properties total | $ | 92,380 |  |  | $ | 92,625 |
a) | In the three months ended March 31, 2017, the Company did not renew certain mineral leases and recorded abandonment expense of $0.25 million in the statement of operations (March 31, 2016 - $Nil).

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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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph b -Article 5 + Details
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