Quarterly report pursuant to Section 13 or 15(d)

Warrant Activity and Related Balances Outstanding (Detail)

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Warrant Activity and Related Balances Outstanding (Detail)
 9 Months Ended
Mar. 31, 2013
Jul. 31, 2012
Number    
Shares purchasable under outstanding warrants at June 30, 2012 2,400,328  
Stock purchase warrants issued 507,019  
Stock purchase warrants exercised 0  
Shares purchasable under outstanding warrants at March 31, 2013 2,907,347  
Average Purchase Price Per Share    
Shares purchasable under outstanding warrants at June 30, 2012 0.41 0.41
Stock purchase warrants issued 0.41  
Stock purchase warrants exercised 0  
Shares purchasable under outstanding warrants at March 31, 2013 0.41 0.41
Maximum [Member]
    
Average Purchase Price Per Share    
Weighted Average Remaining Contract Term 4 years 7 months 2 days  
Minimum [Member]
    
Average Purchase Price Per Share    
Weighted Average Remaining Contract Term 4 years 2 months 16 days