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Plant And Equipment (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Sep. 30, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]      
Cost   $ 21,422 $ 20,561
Accumulated depreciation and write downs   1,720 1,329
Net   19,702 19,232
Value of option to acquire mill equipment 16,000    
Concordia, Mexico [Member]
      
Property, Plant and Equipment [Line Items]      
Cost   18,248 18,238
Accumulated depreciation and write downs   104 92
Net   18,144 18,146
Awak Mas, Indonesia [Member]
      
Property, Plant and Equipment [Line Items]      
Cost   242 233
Accumulated depreciation and write downs   210 171
Net   32 62
Mt. Todd, Australia [Member]
      
Property, Plant and Equipment [Line Items]      
Cost   2,422 1,660
Accumulated depreciation and write downs   982 689
Net   1,440 971
Guadalupe de los Reyes, Mexico [Member]
      
Property, Plant and Equipment [Line Items]      
Cost   22  
Accumulated depreciation and write downs   2  
Net   20  
Corporate, United States [Member]
      
Property, Plant and Equipment [Line Items]      
Cost   488 430
Accumulated depreciation and write downs   422 377
Net   $ 66 $ 53