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Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Income Taxes [Abstract] |  |  |
Bad debt | $ 68,000 | $ 68,000 |
Valuation allowance | (68,000) |  |
Total deferred tax assets - current |  | 68,000 |
Net operating loss carryforwards | 8,963,000 | 7,173,000 |
Oil and gas properties | 4,112,000 | (894,000) |
Property, Plant and Equipment | 668,000 | 711,000 |
Asset retirement obligation | 870,000 | 786,000 |
Tax credits | 260,000 | 202,000 |
Miscellaneous | 53,000 | 95,000 |
Valuation allowance | $ (14,926,000) | (790,000) | $ (790,000)
Total deferred tax assets - noncurrent |  | 7,283,000 |
Net deferred tax asset |  | $ 7,351,000 |

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