Note 10 - Post-employment Benefit Obligations - Plan Summary (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 28, 2020	Nov. 30, 2019	Nov. 24, 2018
Projected benefit obligation	$ 10,090	$ 11,652
Service cost	172	190	$ 196
Interest cost	268	441	418
Actuarial (gains) and losses	345	(1,172)
Benefits paid	(804)	(1,021)
Projected benefit obligation	10,071	10,090	$ 11,652
Accumulated Benefit Obligation	$ 10,034	$ 9,998
Discount rate used to value the ending benefit obligations:	2.00%	2.75%
Current liabilities	$ 613	$ 655
Noncurrent liabilities	9,458	9,435
Total amounts recognized	10,071	10,090
Prior service cost	480	606
Actuarial loss	1,394	1,055
Net amount recognized	1,874	1,661
Total recognized in net periodic benefit cost and accumulated other comprehensive income:	$ 785	$ (541)