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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Jun. 30, 2013
Summary of Significant Accounting Policies [Abstract]  
Fair value of stock options granted to employees estimated using weighted-average assumptions
The fair value of the Company’s stock options granted to employees for the years ended June 30, 2013, 2012 and 2011 was estimated using the following weighted-average assumptions:

 
 
2013
  
2012
  
2011
 
Expected life (years)
  
4
   
4
   
4
 
Risk-free interest rate
  
0.5
%
  
1.2
%
  
1.3
%
Expected volatility
  
78
%
  
82
%
  
87
%
Dividend yield
  
0
%
  
0
%
  
0
%