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Reconciliation of Beginning and Ending Balance of Total Unrecognized Tax Benefits (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2009
Jul. 01, 2012
Reconciliation of beginning and ending balance of total unrecognized tax benefits            
Beginning balance $ 519 $ 374 $ 374 $ 185 $ 98 $ 500
Additions 191 73 145 189 87  
Reductions                 
Ending balance $ 710 $ 447 $ 519 $ 374 $ 185 $ 500