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Mineral Property (Tables)
9 Months Ended
Sep. 30, 2016
Property, Plant and Equipment [Abstract]  
Investment in Mineral Property
(in thousands) September  30, December 31,
  2016 2015
Exploration    
   La Promesa (Peru) $  6  $  6 
   Montana royalty property 40  -  
   Canta Colorado (Peru)
   Norcan (Mexico) -  
   Aconchi (Mexico) -  
     Total exploration mineral property  $49    $19 
Capitalized Development Costs
(in thousands)

Three months ended

September 30,

Nine months ended

September 30,

  2015 2015
Development expenditures $201  $692 
Capitalized interest   154    493 
Property payments   -      190 
Capitalized depreciation
  Total capitalized costs $ 357  $ 1,382 
Exploration Expense
(in thousands) Three months ended
September 30,
Nine months ended
September 30,
  2016 2015 2016 2015
Geologic and field expenses $72  $  9  $320  $24 
Administrative 60  154  24 
Total exploration costs $ 132  $ 16  $ 474  $ 48