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Other Assets - Other Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
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