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Other Assets - Other Assets (Details) (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Deferred offering costs RMB Loan $ 273,000 $ 322,000
Accumulated Mt. Hamilton advance royalty payments 600,000 600,000
Furniture and Fixtures, net of accumulated depreciation 83,000 95,000
Exploration bonds and other assets 42,000 52,000
Total other assets $ 998,000 $ 1,069,000