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Sale of Amadeus Basin Assets (Details) (AUD)
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0 Months Ended | 6 Months Ended |
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Mar. 31, 2014
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Dec. 31, 2014
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| Central Petroleum Limited | ||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Ownership percentage |
11.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mpet_CentralPetroleumLimitedMember |
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| Amadeus Basin | ||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Amount paid in exchange for assets |
20,000,000us-gaap_ProceedsFromSaleOfOilAndGasPropertyAndEquipment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mpet_AmadeusBasinMember |
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| Customary purchase price adjustments |
800,000mpet_ProceedsfromDivestitureofBusinessesCustomaryPurchasePriceAdjustments / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mpet_AmadeusBasinMember |
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| Discount rate |
10.00%mpet_OilandGasPropertyDiscountRate / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mpet_AmadeusBasinMember |
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| Amadeus Basin | Maximum | ||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Bonus discharge amount |
7,000,000.0mpet_OilandGasPropertyBonusDischargeAmount / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mpet_AmadeusBasinMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
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| Amadeus Basin | Palm Valley | ||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Royalty rate |
25.00%mpet_OilandGasPropertyRoyaltyRate / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mpet_AmadeusBasinMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = mpet_PalmValleyMember |
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| AUD/Gigajoule gas price trigger for first ten years |
5.00mpet_OilandGasPropertyRoyaltyRateTriggerGasPriceforFirstTenYears / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mpet_AmadeusBasinMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = mpet_PalmValleyMember |
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| AUD/Gigajoule gas price trigger for following five years |
6.00mpet_OilandGasPropertyRoyaltyRateTriggerGasPriceforFollowingFiveYears / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mpet_AmadeusBasinMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = mpet_PalmValleyMember |
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| Amadeus Basin | Central Petroleum Limited | ||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Shares issued during period for acquisitions |
39,500,000.0us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mpet_AmadeusBasinMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mpet_CentralPetroleumLimitedMember |
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- Definition
Oil and Gas Property, Bonus Discharge Amount No definition available.
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- Definition
Oil and Gas Property, Discount Rate No definition available.
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- Definition
Oil and Gas Property, Royalty Rate No definition available.
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- Definition
Oil and Gas Property, Royalty Rate Trigger Gas Price for First Ten Years No definition available.
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- Definition
Oil and Gas Property, Royalty Rate Trigger Gas Price for Following Five Years No definition available.
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- Definition
Proceeds from Divestiture of Businesses, Customary Purchase Price Adjustments No definition available.
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- Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of shares of stock issued during the period pursuant to acquisitions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Details
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