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INCOME TAXES (Details 1) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryover | $ 26,739 | $ 19,947
Property and equipment | 14,575 | 15,645
Percentage depletion and contribution carryovers | 2,512 | 2,433
Alternative minimum tax credit carryover | 706 | 706
Equity method investment and other | 547 | 630
Deferred compensation liability | 12 | 262
Asset retirement obligations | 377 | 442
Stock-based compensation | (44) | 302
Total deferred tax assets | 45,424 | 40,367
Deferred tax liabilities: |  |
Property and equipment |  |
Oil price risk derivatives |  | (538)
Other | (4) | (4)
Total deferred tax liabilities | (4) | (542)
Net deferred tax assets | 45,420 | 39,825
Less valuation allowance | (45,420) | (39,825)
Net deferred tax asset |  |

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