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Fair Value Measurement - Summary of Fair Value Hierarchy of Financial Assets and Liabilities Measured (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Jun. 30, 2012
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Assets $ 10,016 $ 7,010
Money market funds
   
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Assets 10,016 7,010
Level 1
   
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Assets 10,016 7,010
Level 1 | Money market funds
   
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Assets $ 10,016 $ 7,010