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.

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=118932676&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireOilAndGasPropertyAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Enduro Purchase and Sale Agreement and "Stalking Horse" Bid - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	May 31, 2018	Sep. 30, 2018	Jun. 30, 2018
Asset Acquisition [Line Items]
Third party due diligence expense			$ 400
Affiliate of Enduro Resource Partners LLC
Asset Acquisition [Line Items]
Other income		$ 1,100
Purchase price of oil and gas assets	$ 27,500
Escrow deposit	$ 2,750