Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2014 |
Sep. 30, 2014 |
Jun. 30, 2014 |
Mar. 31, 2014 |
Dec. 31, 2013 |
Sep. 30, 2013 |
Jun. 30, 2015 |
Jun. 30, 2014 |
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| Effect of Fourth Quarter Events [Line Items] | ||||||||||
| Impairment of proved oil and gas properties | $ 17,353 | $ 0 | ||||||||
| Gross unrealized losses | $ (14,917) | $ (7,404) | (14,917) | (7,404) | ||||||
| Selected Quarterly Financial Information [Abstract] | ||||||||||
| Revenue from oil production (1) | 916 | $ 688 | $ 1,265 | $ 1,590 | 1,927 | $ 1,907 | $ 1,633 | $ 2,134 | 4,459 | 7,601 |
| Total operating expenses (2) | 21,459 | 4,863 | 4,153 | 4,280 | 5,092 | 4,927 | 4,193 | 5,737 | 34,755 | 19,949 |
| Loss from continuing operations attributable to Magellan Petroleum Corporation | $ (35,543) | $ (2,115) | $ (2,715) | $ (2,627) | (43,000) | 15,509 | ||||
| Loss from continuing operations | $ (679) | $ (3,072) | $ (2,610) | $ (3,681) | $ (43,411) | $ (10,042) | ||||
| Net loss per basic common share from continuing operations (usd per share) | $ (6.29) | $ (0.45) | $ (0.55) | $ (0.54) | $ (0.20) | $ (0.62) | $ (0.53) | $ (0.72) | $ (7.83) | $ (2.07) |
| Net loss per diluted common share outstanding from continuing operations (usd per share) | $ (6.29) | $ (0.45) | $ (0.55) | $ (0.54) | $ (0.20) | $ (0.62) | $ (0.53) | $ (0.72) | $ (7.83) | $ (2.07) |
| Net (loss) income attributable to common stockholders | $ (35,986) | $ (2,552) | $ (3,145) | $ (3,057) | $ (493) | $ 24,089 | $ (4,533) | $ (5,250) | $ (44,740) | $ 13,813 |
| Net (loss) income per basic common share outstanding attributable to common stockholders (usd per share) | $ (6.29) | $ (0.45) | $ (0.55) | $ (0.54) | $ (0.08) | $ 4.25 | $ (0.80) | $ (0.93) | $ (7.83) | $ 2.44 |
| Net (loss) income per diluted common share outstanding attributable to common stockholders (usd per share) | $ (6.29) | $ (0.45) | $ (0.55) | $ (0.54) | $ (0.08) | $ 4.25 | $ (0.80) | $ (0.93) | $ (7.83) | $ 2.44 |
| Amadeus Basin | ||||||||||
| Effect of Fourth Quarter Events [Line Items] | ||||||||||
| Gain on sale of assets | $ 30,000 | |||||||||
| Nautilus Poplar, LLC (NP) | ||||||||||
| Effect of Fourth Quarter Events [Line Items] | ||||||||||
| Other Income | $ 1,900 | |||||||||
| Recurring | Contingent consideration payable | Level 3 | ||||||||||
| Effect of Fourth Quarter Events [Line Items] | ||||||||||
| Revision to estimate | $ (1,888) | $ (2,403) | ||||||||
| X | ||||||||||
- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Revisions to Estimate No definition available.
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Aggregate revenue during the period related to oil and gas business activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. No definition available.
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- Definition Reflects the sum of all other revenue and income recognized by the entity in the period not otherwise specified in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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