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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2014 Segment | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |  |
Number of reportable segments | 2 |  |  |  |
Segment Reporting Information, Results of operations [Abstract] |  |  |  |  |
Total interest expense | $ 93 | $ 68 | $ 307 | $ 222 |
Operating income (loss) from identified segments | (681) | 403 | 715 | (5,572) |
General and administrative expenses | (2,030) | (1,337) | (5,169) | (3,963) |
Add back Interest expenses | 93 | 68 | 307 | 222 |
Other revenues and expenses | 618 | (1,065) | (472) | (786) |
Income (loss) before income taxes and discontinued operations | (63) | (706) | 243 | (6,469) |
Depreciation depletion and amortization expense [Abstract] |  |  |  |  |
Total depreciation expense | 4,689 | 3,272 | 11,702 | 10,086 |
Assets by segment [Abstract] |  |  |  |  |
Total Assets | 125,511 |  | 125,511 |  | 126,801
Corporate [Member] |  |  |  |  |
Depreciation depletion and amortization expense [Abstract] |  |  |  |  |
Total depreciation expense | 37 | 36 | 112 | 112 |
Assets by segment [Abstract] |  |  |  |  |
Total Assets | 7,205 |  | 7,205 |  | 8,644
Reportable Segment [Member] |  |  |  |  |
Segment Reporting Information, Results of operations [Abstract] |  |  |  |  |
Total revenues | 9,928 | 8,582 | 27,312 | 24,376 |
Total operating expenses | 8,579 | 6,886 | 21,428 | 26,096 |
Total interest expense | 93 | 68 | 307 | 222 |
Operating income (loss) from identified segments | 1,256 | 1,628 | 5,577 | (1,942) |
Add back Interest expenses | 93 | 68 | 307 | 222 |
Reportable Segment [Member] | Oil and Gas [Member] |  |  |  |  |
Segment Reporting Information, Results of operations [Abstract] |  |  |  |  |
Total revenues | 9,928 | 8,582 | 27,312 | 24,376 |
Total operating expenses | 7,649 | 6,082 | 19,084 | 23,948 |
Total interest expense | 93 | 65 | 307 | 213 |
Operating income (loss) from identified segments | 2,186 | 2,435 | 7,921 | 215 |
Add back Interest expenses | 93 | 65 | 307 | 213 |
Depreciation depletion and amortization expense [Abstract] |  |  |  |  |
Total depreciation expense | 4,621 | 3,205 | 11,498 | 9,879 |
Assets by segment [Abstract] |  |  |  |  |
Total Assets | 96,364 |  | 96,364 |  | 97,418
Reportable Segment [Member] | Mineral properties [Member] |  |  |  |  |
Segment Reporting Information, Results of operations [Abstract] |  |  |  |  |
Total operating expenses | 930 | 804 | 2,344 | 2,148 |
Total interest expense | 0 | 3 | 0 | 9 |
Operating income (loss) from identified segments | (930) | (807) | (2,344) | (2,157) |
Add back Interest expenses | 0 | 3 | 0 | 9 |
Depreciation depletion and amortization expense [Abstract] |  |  |  |  |
Total depreciation expense | 31 | 31 | 92 | 95 |
Assets by segment [Abstract] |  |  |  |  |
Total Assets | $ 21,942 |  | $ 21,942 |  | $ 20,739

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