Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Stock Options and Warrants (Detail) - Schedule of stock-based compensation expense

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Share-Based Compensation - Stock Options and Warrants (Detail) - Schedule of stock-based compensation expense (USD $)
3 Months Ended 9 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2012
Allocated Share-based Compensation Expense $ 338,799 $ 611,948 $ 1,009,198 $ 2,006,052
Research and Development Expense [Member]
       
Allocated Share-based Compensation Expense 74,661 58,475 177,874 81,662
General and Administrative Expense [Member]
       
Allocated Share-based Compensation Expense $ 264,138 $ 553,473 $ 831,324 $ 1,924,390