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Mineral Properties - Investment in Mineral Property (Details) (USD $) | Jun. 30, 2013 | Dec. 31, 2012
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Development (United States) |  |
Mt. Hamilton | $ 10,532,000 | $ 9,275,000
Exploration |  |
Pachuca (Mexico) | 20,000 | 20,000
Norcan (Mexico) | 6,000 | 6,000
Aconchi (Mexico) | 5,000 | 5,000
Canta Colorado (Peru) | 3,000 | 3,000
La Promesa (Peru) | 5,000 | 5,000
Cerro Azul (Peru) |  | 3,000
Atico (Peru) |  | 5,000
Jaripo (Mexico) |  | 5,000
Total exploration | 39,000 | 52,000
Total mineral property | $ 10,571,000 | $ 9,327,000

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