Note 7 - Derivative Financial Instruments - Foreign Currency Forward Contracts Outstanding (Details) - Sep. 25, 2021 - Not Designated as Hedging Instrument [Member] € in Thousands, ¥ in Thousands, SFr in Thousands, $ in Millions	USD ($)	EUR (€)	CHF (SFr)	JPY (¥)
Euro Foreign Exchange Forward [Member] | Long [Member]
Contract amount	$ 29.7	€ 25,311
Swiss Franc Foreign Exchange Forward [Member] | Long [Member]
Contract amount	19.0		SFr 17,533
Japanese Yen Foreign Exchange Forward [Member] | Long [Member]
Contract amount	2.5			¥ 276,688
Foreign Exchange Forward [Member]
Contract amount	$ 51.2