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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
Mar. 31, 2014
Jun. 30, 2013
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Assets $ 4,321 $ 10,016
Money market funds
   
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Assets 4,321 10,016
Level 1
   
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Assets 4,321 10,016
Level 1 | Money market funds
   
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Assets $ 4,321 $ 10,016