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FAIR VALUE MEASUREMENTS (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Jun. 30, 2011
Financial assets measured at fair value on recurring basis    
Marketable equity securities $ 16,570 $ 28,876
Recurring basis | Fair value
   
Financial assets measured at fair value on recurring basis    
Money market investments 284  
Marketable equity securities 16,570  
Total assets 16,854  
Recurring basis | Level 1
   
Financial assets measured at fair value on recurring basis    
Money market investments 284  
Marketable equity securities 16,570  
Total assets $ 16,854