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Segment Reporting (Tables)
 9 Months Ended
Sep. 30, 2014
Segment Reporting [Abstract]  
Segment Activity for Three Months
(in thousands) Three months ended September 30,
  Mt Hamilton Exploration Corporate and Other Consolidated
  2014 2013 2014 2013 2014 2013 2014 2013
Exploration expense  $-     $ -   $58  $76  $   -     $ -    $58  $76 
Interest expense (2) -   -   -   -   -   -    -   -  
Other loss (income) (1)(3) -         7    (149) (217)  599  388   450  178 
Pre-tax loss (income)    $ -      $   7     $(91) $(141)    $599  $388     $508  $254 
Segment Activity for Nine Months
(in thousands) Nine months ended September 30,
  Mt Hamilton Exploration Corporate and Other Consolidated
  2014 2013 2014 2013 2014 2013 2014 2013
                 
Exploration expense $ -     $ -   $242  $774   $  -    $  -    $242     $ 774 
Interest expense (2) -   -   -   -   -   -    -   -  
Other loss (income) (1)(3) -         22       36  571   1,306  299  1,342  892 
Pre-tax loss    $ -      $   22     $278  $1,345     $1,306  $ 299     $1,584  $  1,666 
Total assets (4)(5) $15,235  $14,012  $385  $1,195  $4,281  $4,610  $19,901  $19,818 
Capital Expenditures (2) $  1,966  $  2,124  $   -    $     4   $       -   $     5   $  1,966  $  2,133