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Mineral Properties (Schedule Of Business Acquisitions By Acquisition) (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
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Business Acquisition [Line Items] |  |
Mineral Properties, Net | $ 6,156 | $ 7,184
Mt. Todd, Australia [Member] |  |
Business Acquisition [Line Items] |  |
Mineral Properties, Net | 2,146 | 2,146
Guadalupe de los Reyes, Mexico [Member] |  |
Business Acquisition [Line Items] |  |
Mineral Properties, Net | 2,224 | 2,752
Los Cardones, Mexico [Member] |  |
Business Acquisition [Line Items] |  |
Mineral Properties, Net | 1,036 | 1,536
Long Valley, United States [Member] |  |
Business Acquisition [Line Items] |  |
Mineral Properties, Net | $ 750 | $ 750

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- Definition Mineral properties, net of adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6474861&loc=d3e64895-109465 + Details
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