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Oil and Gas Producing Activities - Schedule of Operations from Oil and Natural Gas Producing Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Oil and Gas Property [Abstract]
Oil and natural gas sales	$ 5,539	$ 6,545
Lease operating expense	(1,898)	(2,903)
Production taxes	(392)	(499)
Depreciation, depletion accretion and amortization	(393)	(753)
Impairment of oil and natural gas properties
Results of operations from oil and natural gas producing activities	$ 2,856	$ 2,390

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- Definition

Results of operations lease operating expense.

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- Definition

Depreciation, depletion and amortization, and valuation provisions (impairments) related to oil and gas producing activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 23
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62136-109447

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- Definition

Costs related to the impairment of oil and gas properties.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

The results of operations for oil and gas producing activities, excluding corporate overhead and interest costs.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 26
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- Definition

Production (lifting) costs from oil and gas producing activities, including but not limited to lease operating expense, production and ad valorem taxes, and transportation expense.

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Total revenues from oil and gas producing activities.

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-SubTopic 235
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