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Segment Reporting - Segment Reporting (Details) (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Exploration expense    
Mt Hamilton      
Exploration 48,000 362,000
Corporate and Other      
Consolidated 48,000 362,000
Interest expense (2)(6)    
Mt Hamilton      
Exploration      
Corporate and Other      
Consolidated      
Other (1)(5)    
Mt Hamilton    7,000
Exploration 135,000 351,000
Corporate and Other 452,000 443,000
Consolidated 587,000 801,000
Pre-tax loss    
Mt Hamilton    7,000
Exploration 183,000 713,000
Corporate and Other 452,000 443,000
Consolidated 635,000 1,163,000
Total assets (3)(4)(7)(8)    
Mt Hamilton 15,009,000 14,236,000
Exploration 346,000 1,395,000
Corporate and Other 4,715,000 6,351,000
Consolidated 20,070,000 21,982,000
Capital Expenditures (2)(6)    
Mt Hamilton 646,000 515,000
Exploration      
Corporate and Other      
Consolidated $ 646,000 $ 515,000