Registration of securities issued in business combination transactions

Segment Information (Detail)

v3.6.0.2
Segment Information (Detail)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2016
Segments
Sep. 30, 2016
USD ($)
Segments
Segment
Sep. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
Segments
Jun. 30, 2015
USD ($)
Segment Reporting Information [Line Items]          
Number of operating segments | Segments 3 2   2  
Number of reportable segments   2   2  
Loss from continuing operations   $ (2,195) $ (2,040) $ (3,328) $ (21,596)
Total assets of continuing operations   5,837   31,550 46,700
Expenditures for additions to long lived assets       1 3
Depreciation   11 19 54 148
Exploration   155 17 71 239
Continuing Operations          
Segment Reporting Information [Line Items]          
Total assets of continuing operations   5,837   5,508 8,264
Operating Segments | MPA          
Segment Reporting Information [Line Items]          
Loss from continuing operations   (90) (335) 1,497 (16,146)
Total assets of continuing operations   1,069   1,194 4,593
Exploration       53 91
Operating Segments | Magellan Petroleum UK (MPUK)          
Segment Reporting Information [Line Items]          
Loss from continuing operations   (185) 1 (371) (1,079)
Total assets of continuing operations   2,345   1,234 1,067
Expenditures for additions to long lived assets       0 0
Exploration       18 148
Operating Segments | Corporate          
Segment Reporting Information [Line Items]          
Loss from continuing operations   (1,920) (1,710) (4,507) (4,394)
Total assets of continuing operations   59,762   61,315 60,733
Expenditures for additions to long lived assets       1 3
Depreciation       54 148
Inter-segment elimination          
Segment Reporting Information [Line Items]          
Loss from continuing operations   0 $ 4 53 23
Total assets of continuing operations   $ (57,339)   $ (58,235) $ (58,129)