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Fair Value - Assets and Liabilities at Fair Value (Details) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Notes to Financial Statements    
Marketable equity securities Level 1 $ 3,790,000 $ 7,093,000
Marketable equity securities Level 2      
Marketable equity securities Level 3      
Marketable equity securities Total 3,790,000 7,093,000
Liabilities    
RMB warrants Level 1      
RMB warrants Level 2 185,000 1,138,000
RMB warrants Level 3      
RMB warrants Total 185,000 1,138,000
Kinross calls Level 1 26,000   
Kinross calls Level 2      
Kinross calls Level 3     
Kinross calls Total $ 26,000