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Enduro Purchase and Sale Agreement and Related Subsequent Events - Additional Information (Details) - USD ($) $ in Thousands		12 Months Ended
	May 15, 2018	Jun. 30, 2018
Asset Acquisition [Line Items]
Third party due diligence expense		$ 400
Affiliate of Enduro Resource Partners LLC
Asset Acquisition [Line Items]
Purchase price of oil and gas assets	$ 27,500
Escrow deposit	2,750
Proceeds from break-up fee	$ 1,100

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Asset Acquisition, Contingent Consideration, Escrow Deposit

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- Definition

Asset Acquisition, Contingent Consideration, Proceeds From Break-Up Fee

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- Definition

[Line Items] for Asset Acquisition [Table]

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- Definition

Asset Acquisition, Third Party Due Diligence Expense

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- Definition

The cash outflow to purchase long lived physical asset for use in the normal oil and gas operations and to purchase mineral interests in oil and gas properties not intended for resale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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