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)
 3 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Number    
Shares purchasable under outstanding warrants, Begining Balance 2,907,347 2,400,328
Stock purchase warrants issued 0 458,732
Stock purchase warrants exercised 0 0
Shares purchasable under outstanding warrants, Ending Balance 2,907,347 2,859,060
Weighted Average Exercise Price Per Share    
Shares purchasable under outstanding warrants, Beginning Balance 0.41 0.41
Stock purchase warrants issued 0 0
Stock purchase warrants exercised 0 0
Shares purchasable under outstanding warrants, Ending Balance 0.41 0.41
Weighted Average Remaining Contract Term   4 years 8 months 26 days
Maximum [Member]
    
Weighted Average Exercise Price Per Share    
Weighted Average Remaining Contract Term 4 years 1 month 2 days  
Minimum [Member]
    
Weighted Average Exercise Price Per Share    
Weighted Average Remaining Contract Term 3 years 8 months 16 days