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SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jun. 30, 2012
Jun. 30, 2010
Jun. 30, 2011
SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED)      
Period for calculation of average price for the year   12 months  
Estimated future net cash flows, discount rate (as a percent) 10.00%    
Capitalized Costs Related to Oil and Gas Activities      
Unproved properties $ 39,278 $ 92 $ 36,200
Proved properties 116,312    
Oil and gas properties before accumulated depreciation, depletion and amortization 155,590 92 36,200
Less accumulated DD&A (116,312)    
Oil and gas properties, using full-cost accounting 39,278 92 36,200
Republic of Guinea
     
Capitalized Costs Related to Oil and Gas Activities      
Unproved properties 39,278 92 36,200
Proved properties 116,312    
Oil and gas properties before accumulated depreciation, depletion and amortization 155,590 92 36,200
Less accumulated DD&A (116,312)    
Oil and gas properties, using full-cost accounting $ 39,278 $ 92 $ 36,200