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Share-Based Compensation (Details)
3 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Minimum [Member]
   
Share-based compensation expense for options granted    
Dividend rate      
Risk-free interest rate 0.00% 0.90%
Maximum [Member]
   
Share-based compensation expense for options granted    
Dividend rate      
Price volatility 87.00% 42.00%
Risk-free interest rate 0.90% 1.40%
Expected life 6 years 6 years 6 months