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Marketable Securities - Schedule of Amortized Cost, Unrealized (Loss) Gain and Fair Value of Available-for-Sale Marketable Securities (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]    
Marketable securities, Amortized Cost $ 6,316 $ 9,954
Marketable securities, Unrealized (Loss) Gain (5) (8)
Marketable securities, Fair Value 6,311 9,946
Corporate bonds
   
Schedule of Available-for-sale Securities [Line Items]    
Marketable securities, Amortized Cost 5,067 5,958
Marketable securities, Unrealized (Loss) Gain (6) (8)
Marketable securities, Fair Value 5,061 5,950
Commercial paper
   
Schedule of Available-for-sale Securities [Line Items]    
Marketable securities, Amortized Cost 1,249 3,046
Marketable securities, Unrealized (Loss) Gain 1  
Marketable securities, Fair Value 1,250 3,046
Certificates of deposit
   
Schedule of Available-for-sale Securities [Line Items]    
Marketable securities, Amortized Cost   950
Marketable securities, Fair Value   $ 950