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) (USD $)
3 Months Ended
Sep. 30, 2012
Number  
Shares purchasable under outstanding warrants at June 30, 2012 2,400,328
Stock purchase warrants issued 458,732
Stock purchase warrants exercised 0
Shares purchasable under outstanding warrants at September 30, 2012 2,859,060
Average Purchase Price Per Share  
Shares purchasable under outstanding warrants at June 30, 2012 $ 0.41
Stock purchase warrants issued $ 0.41
Stock purchase warrants exercised $ 0
Shares purchasable under outstanding warrants at September 30, 2012 $ 0.41
Weighted Average Remaining Contract Term (# years) 4 years 8 months 26 days