The aggregate value (measured at the lower of net carrying value or fair value less cost of disposal) for noncurrent assets (assets with expected useful life longer than one year or one operating cycle, whichever is longer) of a disposal group, including a component of the entity (discontinued operation), to be sold or that has subsequently been disposed of through sale, as of the financial statement date.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 46

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ 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=7578670&loc=d3e19207-110258

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- Definition

The amount of estimated gold production, used as an input to measure fair value.

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- Definition

Price per ounce, used as an input to measure fair value.

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- Definition

The estimated time period that gold production will commence, used as an input to measure fair value.

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Fair Value of Financial Instruments (Details) In Thousands, except Per Share data, unless otherwise specified								6 Months Ended
	Jun. 30, 2012 USD ($)	Apr. 18, 2012 USD ($)	Mar. 13, 2012 CAD	Dec. 31, 2011 USD ($)	Apr. 20, 2011 USD ($)	Apr. 20, 2011 CAD	Jun. 30, 2012 Fair Value, Inputs, Level 1 [Member] USD ($)	Jun. 30, 2012 Fair Value, Inputs, Level 3 [Member] USD ($)	Jun. 30, 2012 Maximum [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2012 Minimum [Member] Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Quoted market price of Midas Gold Shares (in dollars per share)		$ 2.30	3.30		$ 3.43	3.30	$ 2.44
Amayapampa interest	$ 4,813			$ 4,813				$ 4,813
Weighted average gold price per ounce (in dollars per ounce)								1,150
Estimated gold production (in ounces)									650,000	350,000
Timing of commencement of commercial production									7 years	2 years