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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2011
Segment Reporting Information [Line Items] |  |  |  |  |
Number of reportable segments |  |  | 2 |  |
Segment Reporting Information, Results of operations [Abstract] |  |  |  |  |
Total Revenues | $ 8,522 | $ 7,025 | $ 16,857 | $ 13,704 |
Total Interest expenses | 36 | 34 | 75 | 57 |
Operating income (loss) from identified segments | (991) | (723) | (1,703) | (3,791) |
General and administrative expenses | (1,760) | (2,138) | (3,654) | (4,549) |
Add back Interest expenses | 36 | 34 | 75 | 57 |
Other revenues and expenses: | 1,615 | 1,143 | 1,494 | (721) |
Income (loss) before income taxes and discontinued operations | 624 | 420 | (209) | (4,512) |
Depreciation depletion and amortization expense [Abstract] |  |  |  |  |
Total depreciation expense | 4,182 | 3,269 | 7,980 | 6,206 |
Assets by segment [Abstract] |  |  |  |  |
Total Assets | 147,283 |  | 147,283 |  | 162,439
Oil and Gas [Member] |  |  |  |  |
Segment Reporting Information, Results of operations [Abstract] |  |  |  |  |
Total Revenues | 8,522 | 7,025 | 16,857 | 13,704 |
Total operating Expenses | 7,111 | 5,075 | 13,645 | 11,939 |
Total Interest expenses | 28 | 20 | 58 | 29 |
Operating income (loss) from identified segments | 1,383 | 1,930 | 3,154 | 1,736 |
Add back Interest expenses | 28 | 20 | 58 | 29 |
Depreciation depletion and amortization expense [Abstract] |  |  |  |  |
Total depreciation expense | 4,030 | 3,120 | 7,671 | 5,905 |
Assets by segment [Abstract] |  |  |  |  |
Total Assets | 94,311 |  | 94,311 |  | 109,141
Mineral properties [Member] |  |  |  |  |
Segment Reporting Information, Results of operations [Abstract] |  |  |  |  |
Total operating Expenses | 642 | 535 | 1,261 | 1,007 |
Total Interest expenses | 6 | 9 | 12 | 18 |
Operating income (loss) from identified segments | (648) | (544) | (1,273) | (1,025) |
Add back Interest expenses | 6 | 9 | 12 | 18 |
Depreciation depletion and amortization expense [Abstract] |  |  |  |  |
Total depreciation expense | 32 | 25 | 64 | 51 |
Assets by segment [Abstract] |  |  |  |  |
Total Assets | 20,754 |  | 20,754 |  | 20,755
Corporate [Member] |  |  |  |  |
Depreciation depletion and amortization expense [Abstract] |  |  |  |  |
Total depreciation expense | 120 | 124 | 245 | 250 |
Assets by segment [Abstract] |  |  |  |  |
Total Assets | 32,217 |  | 32,217 |  | 32,543
Reportable Segment [Member] |  |  |  |  |
Segment Reporting Information, Results of operations [Abstract] |  |  |  |  |
Total Revenues | 8,522 | 7,025 | 16,857 | 13,704 |
Total operating Expenses | 7,753 | 5,610 | 14,906 | 12,946 |
Total Interest expenses | 34 | 29 | 70 | 47 |
Operating income (loss) from identified segments | 735 | 1,386 | 1,881 | 711 |
Add back Interest expenses | $ 34 | $ 29 | $ 70 | $ 47 |

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