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Unaudited Supplemental Oil and Gas Information - Schedule of Proved Oil and Gas Reserves and Changes in Net Proved Reserves (Details) - bbl		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Oil (bbls) [Member]
Reserve quantities, beginning of year		676,030	657,280
Revisions of previous estimates		88,956	302,530
Discoveries and extensions		61,277	22,802
Sale of minerals in place			(194,667)
Production		(75,003)	(111,915)
Reserve quantities, end of year		751,260	676,030
Natural Gas (MMbtu) [Member]
Reserve quantities, beginning of year	[1]	888,507
Revisions of previous estimates	[1]	58,177
Discoveries and extensions	[1]	78,007
Sale of minerals in place	[1]
Production	[1]	(286,692)
Reserve quantities, end of year	[1]	737,998	888,507
Natural Gas (mcfe) [Member]
Reserve quantities, beginning of year	[1]	888,507	1,379,163
Revisions of previous estimates	[1]		55,072
Discoveries and extensions	[1]		21,787
Sale of minerals in place	[1]		(118,944)
Production	[1]		(448,571)
Reserve quantities, end of year	[1]		888,507
[1] Mcf equivalents (Mcfe) consist of natural gas reserves in mcf plus NGLs converted to mcf using a factor of 6 mcf for each barrel of NGL.

X

- Definition

Additions to proved reserves that result from (1) extension of the proved acreage of previously discovered (old) reservoirs through additional drilling in periods after discovery and (2) discovery of new fields with proved reserves or of new reservoirs of proved reserves in old fields.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Form 20-F
-Section Item 18
-Subsection Instruction 2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447

+ Details

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Namespace Prefix:	srt_
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Period Type:	duration

X

- Definition

The net quantity of proved reserves as of the balance sheet date. Proved oil reserves are the estimated quantities of crude oil and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Form 20-F
-Section Item 18
-Subsection Instruction 2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61797-109447

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Namespace Prefix:	srt_
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X

- Definition

Production of proved reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Form 20-F
-Section Item 18
-Subsection Instruction 2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447

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Namespace Prefix:	srt_
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Period Type:	duration

X

- Definition

Revisions represent changes in previous estimates of proved reserves, either upward or downward, resulting from new information (except for an increase in proved acreage) normally obtained from development drilling and production history or resulting from change in economic factors.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Form 20-F
-Section Item 18
-Subsection Instruction 2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447

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Namespace Prefix:	srt_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Sales of minerals in place.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Form 20-F
-Section Item 18
-Subsection Instruction 2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447

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Namespace Prefix:
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X

- Details

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X

- Details

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