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Commitments and Contingencies (Details Narrative) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Oct. 31, 2015
Commitments and contingencies        
Estimated property rentals and option payments $ 1,040,000      
Portion estimated to be mineral property payments 294,000      
Portion estimated to be reimbursable by joint venture partners 694,000      
Office rent expense   72,000 61,000  
Office lease minimum rent payments       $ 47,000