Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Details)

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Earnings Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Earnings Per Share [Abstract]    
Net income (loss) attributable to Magellan Petroleum Corporation $ (5,310) $ 940
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]    
Basic weighted-average shares outstanding (in shares) 53,849,181 52,915,811
Add: dilutive effects of stock options and unvested stock grants 0 [1] 1,804,917 [1]
Diluted weighted-average common shares outstanding (in shares) 53,849,181 54,720,728
Basic net loss per common share (dollars per share) $ (0.10) $ 0.02
Diluted net loss per common share (dollars per share) $ (0.10) $ 0.02
[1] There is no dilutive effect on earnings per share in periods with net losses.