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Segment Reporting - Segment Reporting Three Months Ended March 31 2012 (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Notes to Financial Statements    
Exploration expense Mt Hamilton   $ 169
Exploration Expense Exploration 362 355
Exploration Expense Consolidated 362 524
Interest expense Mt Hamilton   53
Interest expense Corporate and Other   15
Interest expense Consolidated   68
Other (1)(3) Mt Hamilton 7 12
Other (1)(3) Exploration 351 312
Other (1)(3) Corporate and Other 443 55
Other (1)(3) Consolidated 801 379
Pre-tax income (loss) Mt Hamilton (7) (234)
Pre-tax income (loss) Exploration (713) (667)
Pre-tax income (loss) Corporate and Other (443) (70)
Pre-tax income (loss) Consolidated (1,163) (971)
Total assets (2)(4) Mt Hamilton 14,236 9,277
Total assets (2)(4) Exploration 1,395 1,895
Total assets (2)(4) Corporate and Other 6,351 9,295
Total assets (2)(4) Consolidated 21,982 20,467
Capital Expenditures Mt Hamilton 515 355
Capital Expenditures Corporate and Other   9
Capital Expenditures Consolidated $ 515 $ 364