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Revenue Recognition - Schedule of Disaggregated Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Total		$ 1,222	$ 1,538	$ 4,350	$ 5,276
North Dakota [Member]
Total		860	1,202	2,624	3,640
North Dakota [Member] | Oil [Member]
Total		795	1,091	2,384	3,350
North Dakota [Member] | Natural Gas and Liquids [Member]
Total		65	111	240	290
Texas [Member]
Total		364	319	1,426	1,157
Texas [Member] | Oil [Member]
Total		325	220	1,258	791
Texas [Member] | Natural Gas and Liquids [Member]
Total		39	99	168	366
Louisiana [Member]
Total		(2)	17	300	479
Louisiana [Member] | Oil [Member]
Total
Louisiana [Member] | Natural Gas and Liquids [Member]
Total	[1]	$ (2)	$ 17	$ 300	$ 479
[1] Negative production attributable to a combination of an over-accrual in June 2018, which was reversed in July 2018 and maintenance-related downtime on a specific well in Louisiana.

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

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