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Selected Financial Statement Data Inventory (Details) - USD ($)
$ in Thousands
Nov. 02, 2019
Apr. 27, 2019
Selected Financial Statement Data [Abstract]    
Raw materials $ 33,203 $ 30,789
Work-in-process 9,104 8,239
Finished goods 36,930 39,804
Inventories $ 79,237 $ 78,832