Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information
6 Months Ended
Dec. 31, 2011
Document And Entity Information [Abstract]  
Document Type 10-Q
Document Period End Date Dec. 31, 2011
Amendment Flag false
Document Fiscal Period Focus Q2
Document Fiscal Year Focus 2012
Current Fiscal Year End Date --06-30
Entity Central Index Key 0000061398
Entity Current Reporting Status Yes
Entity Filer Category Accelerated Filer
Entity Registrant Name Magellan Petroleum Corp /DE/
Entity Voluntary Filers No
Entity Well Known Seasoned Issuer Yes
Entity Common Stock Shares Outstanding 53,835,594