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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.