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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2014
Accounting Policies [Abstract] |
Change in Asset Retirement Obligation Account Activity | Activity in the asset retirement obligation account for the years ended December 31, is as follows:
|  | 2014 |  |  | 2013 |
Balance, beginning |  | $ | 160 |  |  | $ | 154 |
Accretion of liability due to passage of time |  |  | 6 |  |  |  | 6 |
Amortization of asset due to passage of time |  |  | — |  |  |  | — |
Balance, ending |  | $ | 166 |  |  | $ | 160 |

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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