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Mineral Property (Tables)
3 Months Ended
Mar. 31, 2014
Notes to Financial Statements  
Mineral Property - Investment in Mineral Property
(in thousands) March 31, December 31,
  2014 2013
Development (United States)    
   Mt. Hamilton $12,705  $12,059 
Exploration    
   Pachuca (Mexico) 20  20 
   Norcan (Mexico)
   Aconchi (Mexico)
   Canta Colorado (Mexico)
   La Promesa (Peru)
     Total exploration  39    39 
     Total mineral property $12,744  $12,098
Mineral Property - Capitalized Development Costs
(in thousands)

Three months ended

March 31,

  2014 2013
Development expenditures $ 485  $ 327 
Capitalized interest   153  180 
Property payments -    -   
Capitalized depreciation
  Total capitalized costs $ 646  $ 515 
Mineral Property - Exploration Expense
(in thousands) Three months ended
 March 31,
  2014 2013
Geologic and field expenses $26  $246 
Administrative 22  116 
Total exploration costs $ 48  $ 362