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8. Asset Retirement Obligation (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Details
Fair Value Assumptions, Risk Free Interest Rate	5.40%us-gaap_FairValueAssumptionsRiskFreeInterestRate	5.60%us-gaap_FairValueAssumptionsRiskFreeInterestRate

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- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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