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Other Assets (Tables)
 12 Months Ended
Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Assets
(in thousands) December 31,
  2015 2014
Furniture and Fixtures, net of accumulated depreciation   $   41    $   51 
Exploration bonds and other assets   4    4 
Deferred offering costs RMB Loan -    126 
Total other assets $ 45  $ 181