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 9 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Mar. 31, 2013
Total stock-based compensation expense $ 133,000 $ 29,000 $ 193,000 $ 67,000
Research and Development Expense [Member]
       
Total stock-based compensation expense 4,000 3,000 7,000 10,000
General and Administrative Expense [Member]
       
Total stock-based compensation expense $ 129,000 $ 26,000 $ 186,000 $ 57,000