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Plant And Equipment (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]    
Cost $ 5,510 $ 20,561
Accumulated depreciation and write downs 1,918 1,329
Net 3,592 19,232
Value of option to acquire mill equipment 16,000  
Los Cardones, Mexico [Member]
    
Property, Plant and Equipment [Line Items]    
Cost 1,194 18,238
Accumulated depreciation and write downs 109 92
Net 1,085 18,146
Awak Mas, Indonesia [Member]
    
Property, Plant and Equipment [Line Items]    
Cost 242 233
Accumulated depreciation and write downs 242 171
Net   62
Mt. Todd, Australia [Member]
    
Property, Plant and Equipment [Line Items]    
Cost 3,497 1,660
Accumulated depreciation and write downs 1,124 689
Net 2,373 971
Guadalupe de los Reyes, Mexico [Member]
    
Property, Plant and Equipment [Line Items]    
Cost 21  
Accumulated depreciation and write downs 3  
Net 18  
Corporate, United States [Member]
    
Property, Plant and Equipment [Line Items]    
Cost 556 430
Accumulated depreciation and write downs 440 377
Net 116 53
Assets Held-for-sale [Member]
    
Property, Plant and Equipment [Line Items]    
Cost 10,000  
Net 10,000  
Mill Equipment Estimated Fair Value $ 10,000