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Mineral Properties (Schedule Of Business Acquisitions By Acquisition) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 132 Months Ended |  |  | 12 Months Ended |  |  | 12 Months Ended |  |
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Dec. 31, 2012 | Dec. 31, 2012 | Dec. 31, 2012 Long Valley, United States [Member] | Dec. 31, 2011 Long Valley, United States [Member] | Dec. 31, 2012 Los Cardones, Mexico [Member] | Dec. 31, 2012 Guadalupe de los Reyes, Mexico [Member] | Dec. 31, 2011 Guadalupe de los Reyes, Mexico [Member] | Dec. 31, 2012 Awak Mas, Indonesia [Member] | Dec. 31, 2012 Mt. Todd, Australia [Member] | Dec. 31, 2011 Mt. Todd, Australia [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Mineral properties net, Beginning balance | $ 16,517 |  | $ 750 | $ 750 | $ 10,303 | $ 2,752 | $ 2,752 | $ 566 | $ 2,146 | $ 2,146
Cost recovery | (2,566) |  |  |  | (2,000) |  |  | (566) |  |
Write-down of mineral property | (250) | (250) |  |  | (250) |  |  | (250) |  |
Mineral properties net, Ending balance | $ 13,701 | $ 13,701 | $ 750 | $ 750 | $ 8,053 | $ 2,752 | $ 2,752 |  | $ 2,146 | $ 2,146

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- Definition Amount recognized as an operating expense or loss during the period to reduce the carrying amount of a project that has been impaired but not abandoned. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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- Definition Mineral properties, net of adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 15 -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. + Details
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- Definition Return of or reimbursements received in relation to direct costs and expenses previously paid or incurred. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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