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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 27, 2015
Sep. 26, 2014
Inventory [Line Items]    
Raw Materials $ 18,952us-gaap_InventoryRawMaterialsNetOfReserves $ 16,398us-gaap_InventoryRawMaterialsNetOfReserves
Work in process 195us-gaap_InventoryWorkInProcessNetOfReserves 52us-gaap_InventoryWorkInProcessNetOfReserves
Finished Goods 12,081us-gaap_InventoryFinishedGoodsNetOfReserves 10,355us-gaap_InventoryFinishedGoodsNetOfReserves
Inventories $ 31,228us-gaap_InventoryNet $ 26,805us-gaap_InventoryNet