Annual report pursuant to Section 13 and 15(d)

Basis of Presentation - Major Customers (Details)

v2.4.0.6
Basis of Presentation - Major Customers (Details) (Oil and Gas Production Revenue, Customer Concentration Risk)
12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Nautilus Poplar, LLC (NP)
     
Concentration Risk [Line Items]      
Concentration Risk, Percentage 45.00% 30.00% 8.00%
Customer One | Magellan Petroleum Australia Limited (MPAL)
     
Concentration Risk [Line Items]      
Concentration Risk, Percentage 45.00% 35.00% 25.00%
Customer Two | Magellan Petroleum Australia Limited (MPAL)
     
Concentration Risk [Line Items]      
Concentration Risk, Percentage 8.00% 11.00% 10.00%