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7. Asset Retirement Obligation and Accrued Reclamation Costs (Tables) | 12 Months Ended
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Dec. 31, 2017
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Asset Retirement Obligations |
Asset Retirement Obligation |  |  |
Balance December 31, 2015 |  | $ | 152,827 |
Accretion during 2016 |  |  | 5,455 |
Balance December 31, 2016 |  |  | 158,282 |
Accretion during 2017 |  |  | 5,790 |
Balance December 31, 2017 |  | $ | 164,072 |

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- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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