Note 11 - Accumulated Other Comprehensive Loss - Activity in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
Nov. 28, 2020	Nov. 30, 2019
Balance	$ 178,670	$ 190,309
Balance	158,030	178,670
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(1,236)	(2,338)
Actuarial gains (losses)	(345)	1,172
Net pension amortization reclassified from accumulated other comprehensive loss	133	308
Tax effects	54	(378)
Balance	$ (1,394)	$ (1,236)

Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent.

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