Note 8 - Post Employment Benefit Obligations - Pension Liability (Details) - Pension Plans Defined Benefit and Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	May 30, 2020	Nov. 30, 2019
Combined pension liability	$ 10,061	$ 10,090
Accrued Compensation and Benefits [Member]
Combined pension liability	655	655
Post Employment Benefit Obligations [Member]
Combined pension liability	$ 9,406	$ 9,435