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Plant And Equipment (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 132 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2012
Property, Plant and Equipment [Line Items]      
Cost $ 6,273 $ 5,510 $ 5,510
Accumulated depreciation and write downs 2,575 1,918 1,918
Net 3,698 3,592 3,592
Value of option to acquire mill equipment 16,000    
Impairment of mill equipment 3,500 7,117 10,617
Estimated sale value 7,300    
Commissions and other costs to sell mill equipment 800    
Los Cardones, Mexico [Member]
      
Property, Plant and Equipment [Line Items]      
Cost   1,194 1,194
Accumulated depreciation and write downs   109 109
Net   1,085 1,085
Awak Mas, Indonesia [Member]
      
Property, Plant and Equipment [Line Items]      
Cost   242 242
Accumulated depreciation and write downs   242 242
Mt. Todd, Australia [Member]
      
Property, Plant and Equipment [Line Items]      
Cost 5,472 3,497 3,497
Accumulated depreciation and write downs 1,993 1,124 1,124
Net 3,479 2,373 2,373
Guadalupe de los Reyes, Mexico [Member]
      
Property, Plant and Equipment [Line Items]      
Cost 21 21 21
Accumulated depreciation and write downs 5 3 3
Net 16 18 18
Corporate, United States [Member]
      
Property, Plant and Equipment [Line Items]      
Cost 780 556 556
Accumulated depreciation and write downs 577 440 440
Net 203 116 116
Assets Held-for-sale [Member]
      
Property, Plant and Equipment [Line Items]      
Cost 10,000 10,000 10,000
Net 6,500 10,000 10,000
Impairment of Long-Lived Assets Held-for-use 3,500    
Mill Equipment Estimated Fair Value $ 10,000