Capacity Rationalization Charges (Details) (Severance and Other Employee Related Costs, USD $)
In Thousands, unless otherwise specified
9 Months Ended
Apr. 30, 2013
Severance and Other Employee Related Costs
 
Restructuring Cost and Reserve  
Reserve balance at July 31, 2012 $ 413
Charges against reserve (403)
Reserve adjustment (10)
Reserve balance at April 30, 2013 $ 0