v2.4.0.6
Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Aug. 31, 2012
May 31, 2012
Inventory Disclosure [Line Items]    
Raw Materials $ 13,608 $ 13,997
Work-in-process 2,908 2,110
Finished and purchased goods 18,493 18,885
Inventories $ 35,009 $ 34,992