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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
Jun. 30, 2012
Jun. 30, 2011
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 9,954 $ 11,229
Unrealized (Loss)Gain (8) (13)
Fair Value 9,946 11,216
Corporate bonds
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 5,958 7,326
Unrealized (Loss)Gain (8) (14)
Fair Value 5,950 7,312
Commercial paper
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 3,046 2,699
Fair Value 3,046 2,699
Certificates of deposit
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 950  
Fair Value 950  
U.S. Government obligations
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost   1,204
Unrealized (Loss)Gain   1
Fair Value   $ 1,205