Note 8 - Post Employment Benefit Obligations - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 27, 2022	Aug. 28, 2021	Aug. 27, 2022	Aug. 28, 2021
Service cost	$ 9	$ 31	$ 27	$ 91
Interest cost	58	48	173	146
Amortization of prior service costs	31	31	94	94
Amortization of loss	(33)	(15)	(100)	(45)
Net periodic pension cost	$ 131	$ 125	$ 394	$ 376