Note 10 - Post-employment Benefit Obligations - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	12 Months Ended
Nov. 28, 2020	Nov. 30, 2019	Nov. 24, 2018
Service cost	$ 172	$ 190	$ 196
Interest cost	268	441	418
Amortization of transition obligation	0	0	42
Amortization of prior service cost	126	126	126
Amortization of other loss	8	183	262
Net periodic pension cost	$ 574	$ 940	$ 1,044
Discount rate	2.75%	4.00%	3.50%
Increase in future compensation levels	3.00%	3.00%	3.00%
Fiscal 2021		$ 613
Fiscal 2022		817
Fiscal 2023		778
Fiscal 2024		737
Fiscal 2025		775
Fiscal 2026 through 2030		$ 3,499

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.

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Amount of transition asset (obligation) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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