Note 9 - Post Employment Benefit Obligations (Details Textual) - USD ($) $ in Thousands	May 02, 2017	Aug. 25, 2018	Nov. 25, 2017
Postemployment Benefits Liability, Noncurrent		$ 13,677	$ 13,326
Deferred Compensation, Management Savings Plan [Member]
Deferred Compensation Arrangement with Individual, Recorded Liability			139
Unfunded Deferred Compensation Plan [Member]
Postemployment Benefits Liability, Noncurrent		1,857	1,916
Deferred Compensation, Management Savings Plan [Member]
Deferred Compensation Arrangement with Individual, Recorded Liability		629
Management Savings Plan [member]
Defined Benefit Plan, Fixed Future Benefit Award	$ 2,000
Defined Benefit Plan, Fixed Future Benefit Award, Individual Participants	$ 400
Liability, Defined Benefit Pension Plan		1,055	985
Supplemental Employee Retirement Plan [Member]
Postemployment Benefits Liability, Total		$ 11,188	$ 11,337