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Inventories - Components of Inventories (Detail) - USD ($)
$ in Thousands
Dec. 26, 2020
Dec. 28, 2019
Current inventory:    
Raw materials $ 69,272 $ 61,522
Work in process 16,846 12,631
Finished goods 44,792 31,885
Total current inventory 130,910 106,038
Long term inventory 9,639 10,048
Total inventory $ 140,549 $ 116,086