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Plant And Equipment (Details) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Property, Plant and Equipment [Line Items]          
Cost     $ 5,903   $ 6,273
Accumulated depreciation and write downs     2,858   2,575
Net     3,045   3,698
Impairment of mill equipment   3,500   3,500 3,500
Mineral properties (Note 4)     6,156   7,184
Percentage of interest in joint venture to be earn     70.00%    
Period of payment     3 years    
Increase to sale price of gold project 250        
Mt. Todd, Australia [Member]
          
Property, Plant and Equipment [Line Items]          
Cost     5,483   5,476
Accumulated depreciation and write downs     2,578   1,993
Net     2,905   3,483
Guadalupe de los Reyes, Mexico [Member]
          
Property, Plant and Equipment [Line Items]          
Cost     17   17
Accumulated depreciation and write downs     7   5
Net     10   12
Corporate, United States [Member]
          
Property, Plant and Equipment [Line Items]          
Cost     403   780
Accumulated depreciation and write downs     273   577
Net     130   203
Assets Held-for-sale [Member]
          
Property, Plant and Equipment [Line Items]          
Accumulated depreciation and write downs         3,500
Asset held for sale, cost     6,500   10,000
Assets held for sale (mill equipment)     $ 6,500   $ 6,500