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Segment Disclosure - Net Sales and Long-lived Assets by Geographic Area (Details) - USD ($)
$ in Thousands
3 Months Ended
Aug. 01, 2015
Aug. 02, 2014
May. 02, 2015
Net sales:      
Net sales $ 150,221 $ 166,618  
Long-lived assets:      
Long-lived assets 75,944   $ 72,844
United States      
Net sales:      
Sales 119,867 141,830  
Long-lived assets:      
Long-lived assets 71,090   67,882
Outside U.S.      
Net sales:      
Sales 30,354 $ 24,788  
Long-lived assets:      
Long-lived assets $ 4,854   $ 4,962