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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Income Tax Disclosure [Abstract] |  |  |
Net operating loss carryover | [1] | $ 874 | $ 26,739
Property and equipment |  | 7,123 | 14,575
Percentage depletion and contribution carryovers | [1] | 1,872 | 2,512
Alternative minimum tax credit carryover | [1] | 785 | 706
Equity method investment and other |  | 398 | 547
Deferred compensation liability |  | 8 | 12
Asset retirement obligations |  | 221 | 377
Stock-based compensation |  | 83 | (44)
Total deferred tax assets |  | 11,364 | 45,424
Property and equipment |  |  |
Oil price risk derivatives |  |  |
Other |  | (3) | (4)
Total deferred tax liabilities |  | (3) | (4)
Net deferred tax asset |  | 11,361 | 45,420
Less valuation allowance |  | (11,361) | (45,420)
Net deferred tax assets |  |  |
[1] | On December 27, 2017, the Company paid down debt with common stock. This represented a 49.3% ownership change in the company. This combined with other equity events triggered Net Operation Loss limitations under I.R.C Section 382. As a result, the Company’s Net Operating Loss carryforwards were significantly limited.

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