Annual report pursuant to Section 13 and 15(d)

Assumptions Used to Measure Fair Value of Stock Options (Detail)

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Assumptions Used to Measure Fair Value of Stock Options (Detail)
12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]    
Expected volatility 100.00% 100.00%
Risk free interest rate   3.00%
Risk free interest rate, minimum 0.80%  
Risk free interest rate, maximum 3.00%  
Forfeiture rate 5.00% 5.00%
Dividend yield 0.00% 0.00%
Expected term   10 years
Minimum
   
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]    
Expected term 5 years  
Maximum
   
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]    
Expected term 10 years