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SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED) (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2011
Property acquisition:      
Unproved     $ 9,226
Proved 441 90,834  
Exploration 5,381 28,556 26,882
Total costs incurred 5,822 119,390 36,108
Republic of Guinea
     
Property acquisition:      
Unproved     9,226
Proved 441 90,834  
Exploration 5,381 28,556 26,882
Total costs incurred $ 5,822 $ 119,390 $ 36,108