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Plant and Equipment (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]    
Cost $ 21,151 $ 20,561
Accumulated depreciation and write downs 1,587 1,329
Net 19,564 19,232
Concordia, Mexico [Member]
    
Property, Plant and Equipment [Line Items]    
Cost 18,247 18,238
Accumulated depreciation and write downs 100 92
Net 18,147 18,146
Value of option to acquire mill equipment 16,000  
Awak Mas, Indonesia [Member]
    
Property, Plant and Equipment [Line Items]    
Cost 242 233
Accumulated depreciation and write downs 200 171
Net 42 62
Mt. Todd, Australia [Member]
    
Property, Plant and Equipment [Line Items]    
Cost 2,220 1,660
Accumulated depreciation and write downs 878 689
Net 1,342 971
Guadalupe de los Reyes, Mexico [Member]
    
Property, Plant and Equipment [Line Items]    
Cost 20 0
Accumulated depreciation and write downs 1 0
Net 19 0
Corporate, United States [Member]
    
Property, Plant and Equipment [Line Items]    
Cost 422 430
Accumulated depreciation and write downs 408 377
Net $ 14 $ 53