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Share-Based Compensation (Details)
12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Minimum [Member]
   
Share-based compensation expense for options granted    
Dividend rate      
Price volatility 0.00% 0.00%
Risk-free interest rate 0.90% 1.80%
Maximum [Member]
   
Share-based compensation expense for options granted    
Dividend rate      
Price volatility 75.00% 48.00%
Risk-free interest rate 1.30% 2.10%
Expected life 5 years 10 months 24 days 6 years 1 month 6 days