Note 10 - Post-employment Benefit Obligations - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 26, 2022	Nov. 27, 2021	Nov. 28, 2020
Service cost	$ 36	$ 121	$ 172
Interest cost	231	196	268
Amortization of prior service cost	126	126	126
Amortization of other loss	133	59	8
Net periodic pension cost	$ 526	$ 502	$ 574
Pension Plan [Member]
Discount rate	2.25%	2.00%	2.75%
Increase in future compensation levels	3.00%	3.00%	3.00%