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Enduro Purchase and Sale Agreement - Additional Information (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
May 15, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Asset Acquisition [Line Items] |  |  |  |  |
Enduro transaction breakup fee |  | $ 0 | $ 0 | $ 1,100,000 | $ 0
Affiliate of Enduro Resource Partners LLC |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Purchase price of oil and gas assets | $ 27,500,000 |  |  |  |
Escrow deposit | 2,750,000 |  |  |  |
Enduro transaction breakup fee | $ 1,100,000 |  |  |  |

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- Definition Asset Acquisition, Contingent Consideration, Escrow Deposit + References No definition available. + Details
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- Definition Asset Acquisition, Contingent Consideration, Proceeds From Break-Up Fee + References No definition available. + Details
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- Definition [Line Items] for Asset Acquisition [Table] + References No definition available. + Details
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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 + Details
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- Details
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