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Plant And Equipment (Details) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2014
Jun. 30, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]      
Cost   $ 5,899 $ 6,273
Accumulated depreciation and write downs   2,638 2,575
Net   3,261 3,698
Impairment of mill equipment     3,500
Mineral properties (Note 4)   7,004 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   5,479 5,476
Accumulated depreciation and write downs   2,383 1,993
Net   3,096 3,483
Guadalupe de los Reyes, Mexico [Member]
      
Property, Plant and Equipment [Line Items]      
Cost   17 17
Accumulated depreciation and write downs   6 5
Net   11 12
Corporate, United States [Member]
      
Property, Plant and Equipment [Line Items]      
Cost   403 780
Accumulated depreciation and write downs   249 577
Net   154 203
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