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Other Assets (Tables)
9 Months Ended
Sep. 30, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Assets
(in thousands) September  30, December 31,
  2017 2016
Furniture and Fixtures, net of accumulated depreciation   $   31    $ 32 
Lik project equipment 95   
Vendetta Mining Corp warrants -   735 
Exploration bonds and other assets   4    4 
Total other assets $ 130  $ 771