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Assumptions Used to Measure Fair Value of Stock Options (Detail)
12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
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, minimum 0.80% 0.80%
Risk free interest rate, maximum 3.00% 3.00%
Forfeiture rate 5.00% 5.00%
Dividend yield 0.00% 0.00%
Minimum [Member]
   
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]    
Expected term 5 years 5 years
Maximum [Member]
   
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]    
Expected term 10 years 10 years