Annual report pursuant to Section 13 and 15(d)

Segment Information (Details)

v2.4.0.8
Segment Information (Details) (USD $)
 3 Months Ended 12 Months Ended
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2013
segment
Jun. 30, 2012
Segment Reporting Information [Line Items]                    
Number of Reportable Segments                 3  
Revenues: $ 1,725,000 $ 1,937,000 $ 1,748,000 $ 1,660,000 $ 1,970,000 $ 4,805,000 $ 3,202,000 $ 3,735,000 $ 7,070,000 $ 13,712,000
Net (loss) income attributable to Magellan Petroleum Corporation: (2,840,000) (4,332,000) (7,285,000) (5,310,000) 34,705,000 (4,590,000) (4,557,000) 940,000 (19,767,000) 26,498,000
Assets: 82,272,000       92,574,000       82,272,000 92,574,000
Expenditures for additions to long lived assets:                 2,925,000 9,577,000
Depletion, depreciation, amortization, and accretion                 1,534,000 1,744,000
Lease operating                 7,037,000 12,897,000
Exploration                 8,267,000 6,291,000
Income tax benefit (expense)                 1,266,000 5,951,000
Nautilus Poplar, LLC (NP)
                    
Segment Reporting Information [Line Items]                    
Revenues:                 6,131,000 6,173,000
Net (loss) income attributable to Magellan Petroleum Corporation:                 (326,000) 2,154,000
Assets: 26,093,000       10,833,000       26,093,000 10,833,000
Expenditures for additions to long lived assets:                 2,124,000 4,857,000
Depletion, depreciation, amortization, and accretion                 988,000 819,000
Lease operating                 4,851,000 5,232,000
Exploration                 398,000 1,495,000
Magellan Petroleum Australia Limited (MPA)
                    
Segment Reporting Information [Line Items]                    
Revenues:                 939,000 7,533,000
Net (loss) income attributable to Magellan Petroleum Corporation:                 (6,833,000) 29,260,000
Assets: 32,735,000       62,535,000       32,735,000 62,535,000
Expenditures for additions to long lived assets:                 192,000 3,440,000
Depletion, depreciation, amortization, and accretion                 413,000 695,000
Lease operating                 2,186,000 7,665,000
Exploration                 4,169,000 2,448,000
Income tax benefit (expense)                 1,266,000 5,951,000
MPUK
                    
Segment Reporting Information [Line Items]                    
Net (loss) income attributable to Magellan Petroleum Corporation:                 (4,726,000) (5,068,000)
Assets: 2,021,000       5,213,000       2,021,000 5,213,000
Expenditures for additions to long lived assets:                 350,000 1,135,000
Exploration                 3,700,000 2,348,000
Corporate
                    
Segment Reporting Information [Line Items]                    
Revenues:                 329,000 646,000
Net (loss) income attributable to Magellan Petroleum Corporation:                 27,523,000 [1] (5,416,000) [1]
Assets: 96,229,000       59,099,000       96,229,000 59,099,000
Expenditures for additions to long lived assets:                 259,000 145,000
Depletion, depreciation, amortization, and accretion                 133,000 230,000
Corporate | Magellan Petroleum Australia Limited (MPA)
                    
Segment Reporting Information [Line Items]                    
Proceeds from cash dividends                 35,900,000  
Inter-segment Elimination
                    
Segment Reporting Information [Line Items]                    
Revenues:                 (329,000) (640,000)
Net (loss) income attributable to Magellan Petroleum Corporation:                 (35,405,000) 5,568,000
Assets: $ (74,806,000)       $ (45,106,000)       $ (74,806,000) $ (45,106,000)
[1] During fiscal year June 30, 2013, approximately $35.9 million was included in Corporate net income represented by cash dividends received from MPA, and a deemed distribution related to the transfer of MPUK from MPA to MPC. These intercompany transactions have been eliminated in arriving at the consolidated results.