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Supplemental Balance Sheet Information - Components of inventories (Details) - USD ($)
$ in Thousands
Aug. 31, 2019
Mar. 02, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 40,810 $ 43,890
Work-in-process 17,071 15,533
Finished goods 16,403 18,921
Total inventories $ 74,284 $ 78,344