Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock Outstanding [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Nov. 24, 2018						10,527,636
Balance at Nov. 24, 2018	$ 0	$ 0	$ (21)	$ 0	$ (21)	$ 52,638	$ 0	$ 140,009	$ (2,338)	$ 190,309
Net income (loss)						0	0	(1,928)	0	(1,928)
Amortization of defined benefit plan costs, net of tax						0	0	0	230	230
Actuarial adjustments to defined benefit plans, net of tax						0	0	0	872	872
Regular dividends						$ 0	0	(5,133)	0	(5,133)
Issuance of common stock (in shares)						102,303
Issuance of common stock						$ 511	217	0	0	728
Purchase and retirement of common stock (in shares)						(513,649)
Purchase and retirement of common stock						$ (2,568)	(980)	(3,797)	0	(7,345)
Stock-based compensation						$ 0	958	0	0	958
Balance (in shares) at Nov. 30, 2019						10,116,290
Balance at Nov. 30, 2019	$ 0	$ 0	$ (3,785)	$ 0	$ (3,785)	$ 50,581	195	129,130	(1,236)	178,670
Net income (loss)						0	0	(10,421)	0	(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
Balance (in shares) at Nov. 28, 2020						9,942,787				9,942,787
Balance at Nov. 28, 2020						$ 49,714	0	109,710	(1,394)	$ 158,030
Net income (loss)						0	0	18,042	0	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						$ 0	0	(2,479)	0	$ (2,479)
Balance (in shares) at Nov. 27, 2021						9,762,125				9,762,125
Balance at Nov. 27, 2021						$ 48,811	$ 113	$ 115,631	$ (1,823)	$ 162,732