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Segment Reporting - Segment Information (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Exploration expense    
Mt Hamilton    $ 301,000
Exploration 797,000 1,685,000
Corporate and Other      
Consolidated 797,000 1,986,000
Interest expense    
Mt Hamilton    184,000
Exploration      
Corporate and Other    234,000
Consolidated    418,000
Other (1)    
Mt Hamilton (287,000) 58,000
Exploration 784,000 798,000
Corporate and Other 887,000 986,000
Consolidated 1,384,000 1,842,000
Pre-tax income (loss)    
Mt Hamilton 287,000 (543,000)
Exploration (1,581,000) (2,483,000)
Corporate and Other (887,000) (1,220,000)
Consolidated (2,181,000) (4,246,000)
Total assets (2)(3)    
Mt Hamilton 14,283,000 14,236,000
Exploration 784,000 1,467,000
Corporate and Other 4,433,000 7,780,000
Consolidated 19,500,000 23,483,000
Capital Expenditures (4)    
Mt Hamilton 3,094,000 3,789,000
Exploration 5,000 3,000
Corporate and Other 4,000 62,000
Consolidated $ 3,103,000 $ 3,854,000