Maturity period of highly liquid investments.

No definition available.

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- Definition

Nature of business and presentation.

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 360
-Section 35
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=66906256&loc=d3e66150-109466

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- Definition

Amount recognized for uncertainty in income taxes classified as current.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Basis of Presentation - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Jan. 31, 2018
Nature Of Business And Presentation [Line Items]
Maturity period of highly liquid investments	three months or less
Impairment of oil and gas properties	$ 48,412,000	$ 12,169,000
Liability for material uncertain tax positions	$ 0	0
Option vesting period	3 years
Corporate Headquarter
Nature Of Business And Presentation [Line Items]
Estimated useful lives	30 years
Unproved Oil and Gas Properties
Nature Of Business And Presentation [Line Items]
Impairment of oil and gas properties	$ 14,500,000	$ 12,200,000
Proved Oil And Gas Properties
Nature Of Business And Presentation [Line Items]
Impairment of oil and gas properties	$ 33,900,000
Minimum \| Other Property and Equipment
Nature Of Business And Presentation [Line Items]
Estimated useful lives	3 years
Maximum \| Other Property and Equipment
Nature Of Business And Presentation [Line Items]
Estimated useful lives	5 years
Sales Revenue, Net \| Customer Concentration Risk \| Shell Trading (US) Company
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage	23.00%	15.00%
Sales Revenue, Net \| Customer Concentration Risk \| Texla Energy Management, Inc.
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage	17.00%	15.00%
Sales Revenue, Net \| Customer Concentration Risk \| Enterprise Crude Oil LLC
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage	16.00%	27.00%
Sales Revenue, Net \| Customer Concentration Risk \| Vitol Inc.
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage		16.00%
Sales Revenue, Net \| Customer Concentration Risk \| Ace Gathering, Inc.
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage	14.00%
Sales Revenue, Net \| Customer Concentration Risk \| GulfMark Energy, Inc.
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage	13.00%
Sales Revenue, Net \| Customer Concentration Risk \| NGL Crude Logistics LLC
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage	10.00%	11.00%
Accounts Receivable \| Customer Concentration Risk \| Shell Trading (US) Company
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage	11.00%	22.00%
Accounts Receivable \| Customer Concentration Risk \| Texla Energy Management, Inc.
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage	59.00%
Accounts Receivable \| Customer Concentration Risk \| Phillips 66
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage		23.00%
Accounts Receivable \| Customer Concentration Risk \| Enterprise Crude Oil LLC
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage		37.00%
Accounts Receivable \| Customer Concentration Risk \| Ace Gathering, Inc.
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage	13.00%
Accounts Receivable \| Customer Concentration Risk \| NGL Crude Logistics LLC
Nature Of Business And Presentation [Line Items]
Concentration risk, percentage		10.00%
11.25% Senior Notes
Nature Of Business And Presentation [Line Items]
Debt instrument interest rate (as a percent)	11.25%		11.25%