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Segment Reporting - Segment Activity (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Exploration expense        
Mt Hamilton            
Exploration 136,000 336,000 184,000 698,000
Corporate and Other            
Consolidated 136,000 336,000 184,000 698,000
Interest expense (2)        
Mt Hamilton            
Exploration            
Corporate and Other            
Consolidated            
Other (1)(3)        
Mt Hamilton    7,000    14,000
Exploration 50,000 438,000 185,000 789,000
Corporate and Other 255,000 (532,000) 707,000 (89,000)
Consolidated 305,000 (87,000) 892,000 714,000
Pre-tax loss        
Mt Hamilton    7,000    14,000
Exploration 186,000 774,000 369,000 1,487,000
Corporate and Other 255,000 (532,000) 707,000 (89,000)
Consolidated 441,000 249,000 1,076,000 1,412,000
Total assets (4)(5)        
Mt Hamilton       15,121,000 13,904,000
Exploration       316,000 1,019,000
Corporate and Other       3,813,000 4,563,000
Consolidated       19,250,000 19,486,000
Capital Expenditures (2)        
Mt Hamilton       1,258,000 1,257,000
Exploration            
Corporate and Other            
Consolidated       $ 1,258,000 $ 1,257,000