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PLANT AND EQUIPMENT AND MINERAL PROPERTIES | 3 Months Ended
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Mar. 31, 2017
Property, Plant and Equipment [Abstract] |
Plant and Equipment and Mineral Properties | PLANT AND EQUIPMENT AND MINERAL PROPERTIES 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 |
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 The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + 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 210.5-02.13-14) -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 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51717284&loc=d3e1361-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=51719941&loc=d3e2921-110230 Reference 4: 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 + Details
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