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Fair Value - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) (USD $)
 9 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Assets    
Marketable equity securities Level 1 $ 3,012,000 $ 3,973,000
Marketable equity securities Level 2      
Marketable equity securities Level 3      
Marketable equity securities Total 3,012,000 3,973,000
Liabilities    
RMB warrants Level 1      
RMB warrants Level 2 282,000 140,000
RMB warrants Level 3      
RMB warrants Total 282,000 140,000
Kinross calls Level 1   3,000
Kinross calls Level 2     
Kinross calls Level 3     
Kinross calls Total   $ 3,000