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Other Assets (Tables)
3 Months Ended
Mar. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Assets
(in thousands) March 31, December 31
  2019 2018
Furniture and fixtures, net of accumulated depreciation   $   34    $   36 
Lik project equipment, net of accumulated depreciation 65  70 
Exploration bonds and other assets   4    4 
Office lease asset 73   -  
Total other assets $176  $110