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15. INCOME TAXES (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Assets (Liabilities)
Difference in depreciation, depletion, and capitalization methods - oil and natural gas properties	$ 479	$ 1,863
Net operating losses	5,507	4,131
Impairment - oil and natural gas properties	0	(1,122)
Other	438	753
Total deferred tax asset	6,424	5,625
Less valuation allowance	(6,424)	(5,625)
Total deferred tax assets	$ 0	$ 0

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