Note 9 - Post-employment Benefit Obligations - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 27, 2021	Nov. 28, 2020	Nov. 30, 2019
Service cost	$ 121	$ 172	$ 190
Interest cost	196	268	441
Amortization of prior service cost	126	126	126
Amortization of other loss	59	8	183
Net periodic pension cost	$ 502	$ 574	$ 940