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, 2014
Mar. 31, 2013
Number    
Shares purchasable under outstanding warrants 2,907,347 2,400,328
Stock purchase warrants issued 17,991,000 507,019
Stock purchase warrants exercised 0 0
Shares purchasable under outstanding warrants 20,898,347 2,907,347
Weighted Average Exercise Price Per Share    
Shares purchasable under outstanding warrants at June 30, 2013, repriced 0.27 0.41
Stock purchase warrants issued 0.19 0.41
Stock purchase warrants exercised 0 0
Shares purchasable under outstanding warrants at March 31, 2014 0.20 0.41
Weighted Average Remaining Contract Term 3 years 2 months 16 days  
Class Of Warrant Or Right Exercised Stock Purchase Warrants Issued Weighted Average Remaining Contract Term Of Warrants Or Rights 5 years  
Maximum [Member]
    
Weighted Average Exercise Price Per Share    
Weighted Average Remaining Contract Term 5 years 4 years 7 months 2 days
Minimum [Member]
    
Weighted Average Exercise Price Per Share    
Weighted Average Remaining Contract Term 3 years 2 months 16 days 4 years 2 months 16 days