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2. Summary of Significant Accounting Policies (Details) | 12 Months Ended
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Dec. 31, 2017
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Pre-Development Activities | Pre-Development Activities Pre-development activities involve cost incurred that may ultimately benefit production, such as underground ramp development, pumping, and open-pit development, which are expensed due to the lack of evidence of economic development, which is necessary to demonstrate future recoverability of these expenses. These costs are charged to operations as incurred.

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- Definition Disclosure of accounting policy for the preproduction design and development costs it incurs related to long-term supply arrangements, including whether such costs are capitalized or expensed as incurred. The entity also may disclose the aggregate amount of (1) assets recognized for agreements that contractually reimburse the entity for its pre-production design and development costs (2) assets recognized for molds, dies and other tools that the entity owns and (3) assets recognized for molds, dies and other tools that the entity does not own. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section S99 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=27011391&loc=d3e105117-122735 + Details
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- References No definition available. + Details
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