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Segment Reporting - Segment Activity 9 Months (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Segment Reporting [Abstract] |  |  |  |
Exploration expense Mt Hamilton |  | $ (6,000) |  | $ 308,000
Exploration Expense Exploration | 76,000 | 513,000 | 774,000 | 1,277,000
Exploration Expense Corporate and Other |  |  |  |
Exploration Expense Consolidated | 76,000 | 507,000 | 774,000 | 1,585,000
Interest expense (2) Mt Hamilton |  | 41,000 |  | 143,000
Interest expense (2) Exploration |  |  |  |
Interest expense (2) Corporate and Other |  | 64,000 |  | 103,000
Interest expense (2) Consolidated |  | 105,000 |  | 246,000
Other loss (income) (1)(3) Mt Hamilton | 7,000 | 16,000 | 22,000 | 43,000
Other loss (income) (1)(3) Exploration | (17,000) | (8,000) | 771,000 | 692,000
Other loss (income) (1)(3) Corporate and Other | 388,000 | 1,394,000 | 99,000 | 566,000
Other loss (income) (1)(3) Consolidated | 378,000 | 1,402,000 | 892,000 | 1,301,000
Pre-tax loss Mt Hamilton | 7,000 | 51,000 | 22,000 | 494,000
Pre-tax loss Exploration | 59,000 | 505,000 | 1,545,000 | 1,969,000
Pre-tax loss Corporate and Other | 188,000 | 1,258,000 | 99,000 | 669,000
Pre-tax loss Consolidated | 254,000 | 1,814,000 | 1,666,000 | 3,132,000
Total assets (4)(5) Mt Hamilton |  |  | 14,012,000 | 14,216,000
Total assets (4)(5) Exploration |  |  | 1,195,000 | 1,768,000
Total assets (4)(5) Corporate and Other |  |  | 4,610,000 | 8,415,000
Total assets (4)(5) Consolidated |  |  | 19,818,000 | 24,399,000
Capital Expenditures (2) Mt Hamilton |  |  | 2,124,000 | 2,589,000
Capital Expenditures (2) Exploration |  |  | 4,000 | 3,000
Capital Expenditures (2) Corporate and Other |  |  | 5,000 | 51,000
Capital Expenditures (2) Consolidated |  |  | $ 2,133,000 | $ 2,643,000

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