Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Nov. 28, 2020	Nov. 30, 2019	Nov. 24, 2018
Net income (loss)	$ (10,421)	$ (1,928)	$ 8,218
Other comprehensive income (loss):
Recognize prior service cost associated Actuarial adjustment to Long Term Cash Awards (LTCA)	(86)	(141)
Other comprehensive income (loss), net of tax	(158)	1,102	777
Total comprehensive income (loss)	(10,579)	(826)	8,995
Pension Plan [Member]
Other comprehensive income (loss):
Amortization	125	124	126
Income taxes	(10)	4	(32)
Supplemental Employee Retirement Plan [Member]
Other comprehensive income (loss):
Amortization	8	184	304
Income taxes	64	(382)	(237)
Actuarial adjustment to supplemental executive retirement defined benefit plan (SERP)	$ (259)	$ 1,313	$ 616