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Note 9 - Post Employment Benefit Obligations (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
May 27, 2017
Jun. 01, 2019
Mar. 02, 2019
Nov. 24, 2018
Unfunded Deferred Compensation Plan [Member]        
Deferred Compensation Arrangement with Individual, Recorded Liability     $ 1,798 $ 1,837
Deferred Compensation, Management Savings Plan [Member]        
Deferred Compensation Arrangement with Individual, Recorded Liability   $ 726   611
Management Savings Plan [member]        
Deferred Compensation Arrangement with Individual, Contributions by Employer $ 2,000      
Defined Benefit Plan, Fixed Future Benefit Award, Individual Participants $ 400      
Deferred Compensation Arrangement with Individual, Recorded Liability   1,124   1,078
Supplemental Employee Retirement Plan [Member]        
Liability, Other Postretirement Defined Benefit Plan   $ 10,038   $ 10,574