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Accrued Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Jun. 30, 2012
Accrued Liabilities [Line Items]    
Accrued pre-clinical and clinical trial expenses $ 279 $ 485
Accrued compensation and benefits 604 426
Accrued legal and professional services expenses 145 187
Other 110 82
Accrued liabilities $ 1,138 $ 1,180