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Other Assets - Other Assets (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Deferred offering costs RMB Loan $ 469 $ 518
Accumulated Mt. Hamilton advance royalty payments 300 300
Furniture and Fixtures, net of accumulated depreciation 128 143
Exploration bonds and other assets 110 111
Total other assets $ 1,007 $ 1,072