Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Feb. 27, 2021	Feb. 29, 2020
Net income	$ 4,011	$ 1,210
Other comprehensive income:
Other comprehensive income, net of tax	35	25
Total comprehensive income	4,046	1,235
Pension Plan [Member]
Other comprehensive income:
Amortization associated with Long Term Cash Awards (LTCA)	36	31
Income taxes related to Retirement Plan	(9)	(8)
Supplemental Employee Retirement Plan [Member]
Other comprehensive income:
Amortization associated with Long Term Cash Awards (LTCA)	11	2
Income taxes related to Retirement Plan	$ (3)	$ 0