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PLANT AND EQUIPMENT AND MINERAL PROPERTIES | 12 Months Ended
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Dec. 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:
| December 31, 2017 |  | December 31, 2016
| Cost |  | Accumulated Depreciation |  | Net Book Value |  | Cost |  | Accumulated Depreciation |  | Net Book Value
Plant and equipment |  |  |  |  |  |  |  |  |  |  |
Nichols Ranch | $ | 29,210 |  |  | $ | (9,971 | ) |  | $ | 19,239 |  |  | $ | 29,210 |  |  | $ | (6,804 | ) |  | $ | 22,406 |
Alta Mesa | 13,626 |  |  | (1,388 | ) |  | 12,238 |  |  | 13,626 |  |  | (456 | ) |  | 13,170 |
Equipment and other | 13,367 |  |  | (11,768 | ) |  | 1,599 |  |  | 13,367 |  |  | (11,361 | ) |  | 2,006 |
Plant and equipment total | $ | 56,203 |  |  | $ | (23,127 | ) |  | $ | 33,076 |  |  | $ | 56,203 |  |  | $ | (18,621 | ) |  | $ | 37,582 |
The net book value for Nichols Ranch Project includes the value beyond proven and probable reserves ascribed to the processing plant, the Nichols Ranch wellfields and the Jane Dough project upon acquisition. For the year ended December 31, 2017, the Company recorded $3.17 million (2016 - $4.43 million) of depreciation expense related to Nichols Ranch, which is included in the costs and expenses applicable to revenue in the Statement of the operations and comprehensive income for the year ended December 31, 2017. The following is a summary of mineral properties:
| December 31, 2017 |  | December 31, 2016
Mineral properties |  |  |
Uranerz ISR properties (a) | $ | 25,974 |  |  | $ | 35,060 |
Sheep Mountain | 34,183 |  |  | 34,183 |
Roca Honda (b) | 22,095 |  |  | 22,095 |
Other (a) | 1,287 |  |  | 1,287 |
Mineral properties total | $ | 83,539 |  |  | $ | 92,625 |
a) | In the year ended December 31, 2017 the Company did not renew certain mineral leases and recorded abandonment expense of $0.29 million (December 31, 2016 – $1.04 million, December 31, 2015 – $2.77 million) in the statement of operations.
b) | On May 27, 2016, the Company issued 1,212,173 shares to acquire the remaining 40% interest of the Roca Honda project for consideration of $2.63 million and an additional $4.5 million in cash payable upon first commencement of commercial mineral extraction. The acquisition was accounted for as a purchase of assets as Roca Honda does not meet the definition of a business under FASB ASC Topic 805, Business Combinations because Roca Honda does not currently have the resources, both inputs and processes, to apply to the Roca Honda property in order to extract uranium.

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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 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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