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Segment Reporting - Segment Activity (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Exploration expense        
Mt Hamilton            
Exploration 58,000 76,000 242,000 774,000
Corporate and Other            
Consolidated 58,000 76,000 242,000 774,000
Interest expense (2)        
Mt Hamilton            
Exploration            
Corporate and Other            
Consolidated            
Other loss (income) (1)(3)        
Mt Hamilton    7,000    22,000
Exploration (149,000) (217,000) 36,000 571,000
Corporate and Other 599,000 388,000 1,306,000 299,000
Consolidated 450,000 178,000 1,342,000 592,000
Pre-tax loss        
Mt Hamilton    7,000    22,000
Exploration (91,000) (141,000) 278,000 1,345,000
Corporate and Other 599,000 388,000 1,306,000 299,000
Consolidated 508,000 254,000 1,584,000 1,666,000
Total assets (4)(5)        
Mt Hamilton     15,235,000 14,012,000
Exploration     385,000 1,195,000
Corporate and Other     4,281,000 4,610,000
Consolidated     19,901,000 19,818,000
Capital Expenditures (2)        
Mt Hamilton     1,966,000 2,124,000
Exploration        4,000
Corporate and Other        5,000
Consolidated     $ 1,996,000 $ 2,133,000