Annual report pursuant to Section 13 and 15(d)

Segment Information (Details)

v3.3.0.814
Segment Information (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2014
USD ($)
Jun. 30, 2014
USD ($)
Mar. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Sep. 30, 2013
USD ($)
Jun. 30, 2015
USD ($)
segment
Jun. 30, 2014
USD ($)
Segment Reporting Information [Line Items]                    
Number of operating segments | segment                 3  
Revenue from NP oil production $ 916 $ 688 $ 1,265 $ 1,590 $ 1,927 $ 1,907 $ 1,633 $ 2,134 $ 4,459 $ 7,601
Loss from continuing operations, net of tax         (679) $ (3,072) $ (2,610) $ (3,681) (43,411) (10,042)
Assets 46,700       81,435       46,700 81,435
Expenditures for additions to long lived assets                 9,073 20,923
Depletion, depreciation, amortization, and accretion                 1,149 1,123
Lease operating                 5,089 6,257
Exploration                 1,563 3,484
Nautilus Poplar, LLC (NP)                    
Segment Reporting Information [Line Items]                    
Other Income                 1,900  
Operating segments | Nautilus Poplar, LLC (NP)                    
Segment Reporting Information [Line Items]                    
Revenue from NP oil production                 4,459 7,601
Loss from continuing operations, net of tax                 (19,092) 1,828
Assets 37,130       48,161       37,130 48,161
Expenditures for additions to long lived assets                 8,795 20,334
Depletion, depreciation, amortization, and accretion                 1,001 977
Lease operating                 5,089 6,257
Exploration                 1,079 541
Operating segments | Magellan Petroleum Australia Limited (MPA)                    
Segment Reporting Information [Line Items]                    
Loss from continuing operations, net of tax                 (16,404) (934)
Assets 4,593       14,215       4,593 14,215
Exploration                 91 436
Operating segments | MPUK                    
Segment Reporting Information [Line Items]                    
Loss from continuing operations, net of tax                 (1,799) (2,585)
Assets 2,373       7,156       2,373 7,156
Expenditures for additions to long lived assets                 275 526
Exploration                 393 2,507
Corporate                    
Segment Reporting Information [Line Items]                    
Loss from continuing operations, net of tax                 (6,139) (8,351)
Assets 79,474       88,249       79,474 88,249
Expenditures for additions to long lived assets                 3 63
Depletion, depreciation, amortization, and accretion                 148 146
Inter-segment Elimination                    
Segment Reporting Information [Line Items]                    
Loss from continuing operations, net of tax                 23 0
Assets $ (76,870)       $ (76,346)       $ (76,870) $ (76,346)