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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Schedule of Property, Plant and Equipment Useful Lives | 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 & utility vehicles | 5 years
The following is a summary of plant and equipment:
| December 31, 2018 |  | December 31, 2017
| Cost |  | Accumulated Depreciation |  | Net Book Value |  | Cost |  | Accumulated Depreciation |  | Net Book Value
Plant and equipment |  |  |  |  |  |  |  |  |  |  |
Nichols Ranch | $ | 29,210 |  |  | $ | (12,021 | ) |  | $ | 17,189 |  |  | $ | 29,210 |  |  | $ | (9,971 | ) |  | $ | 19,239 |
Alta Mesa | 13,656 |  |  | (2,319 | ) |  | 11,337 |  |  | 13,626 |  |  | (1,388 | ) |  | 12,238 |
Equipment and other | 13,444 |  |  | (12,127 | ) |  | 1,317 |  |  | 13,367 |  |  | (11,768 | ) |  | 1,599 |
Plant and equipment total | $ | 56,310 |  |  | $ | (26,467 | ) |  | $ | 29,843 |  |  | $ | 56,203 |  |  | $ | (23,127 | ) |  | $ | 33,076 |

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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 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: 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 + Details
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