Note 10 - Post-employment Benefit Obligations (Details Textual) $ in Thousands			12 Months Ended
	May 02, 2017 USD ($)	May 01, 2017	Nov. 26, 2022 USD ($)	Nov. 27, 2021 USD ($)	Nov. 28, 2020 USD ($)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax, Total			$ (314)	$ 2,448
Postemployment Benefits Liability, Noncurrent			$ 9,954	12,968
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay			25.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent			8.00%
Defined Contribution Plan, Cost			$ 1,108	1,040	$ 548
Unfunded Deferred Compensation Plan [Member]
Pension Cost (Reversal of Cost)			154	204	176
Postemployment Benefits Liability, Noncurrent			1,616	1,648
Management Savings Plan [member]
Defined Benefit Plan, Fixed Future Benefit Award	$ 2,000
Defined Benefit Plan, Fixed Future Benefit Award, Individual Participants	$ 400
Defined Benefit Plan, Benefit Obligation, Number of Annual Installments	10
Payment to Acquire Life Insurance Policy, Operating Activities			853	647	609
Current Net Death Benefit			14,998
Supplemental Employee Retirement Plan [Member]
Deferred Compensation Arrangement with Individual, Deferred Compensation, Maximum Percentage of Base Salary		75.00%
Deferred Compensation Arrangement with Individual, Deferred Compensation, Maximum Percentage of Discretionary, Annual Incentive or Other Bonus		100.00%
Deferred Compensation Arrangement with Individual, Deferred Compensation, Annual installment Payments, Maximum Number of Years		15 years
Deferred Compensation Arrangement with Individual, Deferred Compensation, Scheduled Distributions, Maximum Number of Years		5 years
Deferred Compensation Arrangement with Individual, Compensation Expense			(16)	338	$ 264
Current Net Death Benefit			$ 1,587
Percent Of Final Average Compensation Provided By Supplemental Retirement Income Plan			65.00%
Death Benefit Percent Of Final Average Annual Compensation For Period of 120 Months			50.00%
Death Benefit Payment Term			120 months
Death Benefit Percent Of Final Average Annual Compensation Single Payment			200.00%
Supplemental Employee Retirement Plan [Member] | Non-current Portion of Post Employment Benefits Liability [Member]
Deferred Compensation Arrangement with Individual, Recorded Liability			$ 2,070	$ 1,789