Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Details)

v2.4.1.9
Segment Information (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
segment
Mar. 31, 2014
Jun. 30, 2014
Segment Reporting Information [Line Items]          
Number of reportable segments     3us-gaap_NumberOfReportableSegments    
Loss from continuing operations $ (2,237)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments $ (3,072)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments $ (7,750)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments $ (9,364)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments  
Consolidated net loss from continuing operations (2,280)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest (3,072)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest (7,793)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest (9,364)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest  
Total assets 66,159us-gaap_Assets   66,159us-gaap_Assets   81,435us-gaap_Assets
Nautilus Poplar, LLC (NP)          
Segment Reporting Information [Line Items]          
Revenue from oil production 688us-gaap_OilAndGasRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_NautilusPoplarLlcNpMember
1,907us-gaap_OilAndGasRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_NautilusPoplarLlcNpMember
3,543us-gaap_OilAndGasRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_NautilusPoplarLlcNpMember
5,674us-gaap_OilAndGasRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_NautilusPoplarLlcNpMember
 
Loss from continuing operations 481us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_NautilusPoplarLlcNpMember
40us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_NautilusPoplarLlcNpMember
(63)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_NautilusPoplarLlcNpMember
(536)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_NautilusPoplarLlcNpMember
 
Total assets 29,997us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_NautilusPoplarLlcNpMember
  29,997us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_NautilusPoplarLlcNpMember
  27,299us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_NautilusPoplarLlcNpMember
Magellan Petroleum UK (MPUK)          
Segment Reporting Information [Line Items]          
Loss from continuing operations (300)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumUKMPUKMember
(1,349)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumUKMPUKMember
(881)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumUKMPUKMember
(2,495)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumUKMPUKMember
 
Total assets 3,102us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumUKMPUKMember
  3,102us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumUKMPUKMember
  4,486us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumUKMPUKMember
Magellan Petroleum Australia (MPA)          
Segment Reporting Information [Line Items]          
Loss from continuing operations (402)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumAustraliaPtyLtdMember
0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumAustraliaPtyLtdMember
(1,159)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumAustraliaPtyLtdMember
0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumAustraliaPtyLtdMember
 
Total assets 4,819us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumAustraliaPtyLtdMember
  4,819us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumAustraliaPtyLtdMember
  14,073us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= mpet_MagellanPetroleumAustraliaPtyLtdMember
Corporate          
Segment Reporting Information [Line Items]          
Loss from continuing operations (2,059)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
(1,949)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
(5,690)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
(6,700)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
 
Total assets 105,490us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
  105,490us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
  111,113us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Inter-segment Elimination          
Segment Reporting Information [Line Items]          
Loss from continuing operations 0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_IntersegmentEliminationMember
186us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_IntersegmentEliminationMember
0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_IntersegmentEliminationMember
367us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_IntersegmentEliminationMember
 
Total assets $ (77,249)us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_IntersegmentEliminationMember
  $ (77,249)us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_IntersegmentEliminationMember
  $ (75,536)us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_IntersegmentEliminationMember