Quarterly report pursuant to Section 13 or 15(d)

Employee Option Grants and Non-employee Option Grants (Detail)

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Employee Option Grants and Non-employee Option Grants (Detail) (USD $)
3 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Total stock-based compensation expense $ 23,000 $ 45,000
Research and Development Expense [Member]
   
Total stock-based compensation expense (1,000) 5,000
General and Administrative Expense [Member]
   
Total stock-based compensation expense $ 24,000 $ 40,000