Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Total
Balance (in shares) at Nov. 30, 2019	10,116,290
Balance at Nov. 30, 2019	$ 50,581	$ 195	$ (3,785)	$ 129,130	$ (1,236)	$ (3,785)	$ 178,670
Net Income (loss)				(10,421)			(10,421)
Amortization of defined benefit plan costs, net of tax	0	0		0	98		98
Actuarial adjustments to defined benefit plans, net of tax	0	0		0	(256)		(256)
Regular dividends	$ 0	0		(4,545)	0		(4,545)
Issuance of common stock (in shares)	43,218
Issuance of common stock	$ 216	69		0	0		285
Purchase and retirement of common stock (in shares)	(216,721)
Purchase and retirement of common stock	$ (1,083)	(684)		(669)	0		(2,436)
Stock-based compensation	$ 0	420		0	0		420
Issuance of common stock (in shares)	43,218
Issuance of common stock	$ 216	69		0	0		285
Balance (in shares) at Nov. 28, 2020	9,942,787
Balance at Nov. 28, 2020	$ 49,714	0		109,710	(1,394)		158,030
Net Income (loss)				18,042			18,042
Amortization of defined benefit plan costs, net of tax	0	0		0	138		138
Actuarial adjustments to defined benefit plans, net of tax	0	0		0	(567)		(567)
Regular dividends	$ 0	0		(5,210)	0		(5,210)
Issuance of common stock (in shares)	34,902
Issuance of common stock	$ 175	230		0	0		405
Purchase and retirement of common stock (in shares)	(215,564)
Purchase and retirement of common stock	$ (1,078)	(275)		(4,432)	0		(5,785)
Stock-based compensation	$ 0	158		0	0		158
Special dividend				(2,479)			(2,479)
Issuance of common stock (in shares)	34,902
Issuance of common stock	$ 175	230		0	0		405
Special dividend				2,479			2,479
Balance (in shares) at Nov. 27, 2021	9,762,125
Balance at Nov. 27, 2021	$ 48,811	113		115,631	(1,823)		162,732
Net Income (loss)				65,345			65,345
Amortization of defined benefit plan costs, net of tax	0	0		0	192		192
Actuarial adjustments to defined benefit plans, net of tax	0	0		0	1,885		1,885
Regular dividends	$ 0	0		(5,668)	0		(5,668)
Issuance of common stock (in shares)	59,024
Issuance of common stock	$ 295	129		0	0		424
Purchase and retirement of common stock (in shares)	(869,310)
Purchase and retirement of common stock	$ (4,347)	(780)		(10,014)	0		(15,141)
Stock-based compensation	0	538		0	0		538
Special dividend	$ (0)	(0)		14,494	(0)		14,494
Issuance of common stock (in shares)	59,024
Issuance of common stock	$ 295	129		0	0		424
Foreign currency translation adjustments, net of tax					(204)		(204)
Special dividend	$ 0	0		(14,494)	0		(14,494)
Balance (in shares) at Nov. 26, 2022	8,951,839
Balance at Nov. 26, 2022	$ 44,759	$ 0		$ 150,800	$ 50		$ 195,609