Note 15 - Changes to Stockholders' Equity - Changes Occurred in Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 30, 2025	Aug. 31, 2024	Aug. 30, 2025	Aug. 31, 2024
Beginning of period			$ 167,327
End of period	$ 165,718		165,718
Net income (loss) for the period	801	$ (4,505)	4,573	$ (12,899)
Amortization of pension costs, net of tax	(0)	(16)	(0)	(46)
Common Stock [Member]
Beginning of period	43,410	43,808	43,681	43,842
Issuance of common stock	85	100	250	291
Purchase and retirement of common stock	(117)	(234)	(553)	(459)
End of period	$ 43,378	$ 43,674	$ 43,378	$ 43,674
Beginning of period (in shares)	8,681,851	8,761,332	8,736,046	8,768,221
Issuance of common stock (in shares)	16,978	20,139	50,167	58,256
Purchase and retirement of common stock (in shares)	(23,311)	(46,843)	(110,695)	(91,849)
End of period (in shares)	8,675,518	8,734,628	8,675,518	8,734,628
Additional Paid-in Capital [Member]
Beginning of period	$ 0	$ 52	$ 6	$ 93
End of period	0	0	0	0
Issuance of common stock	1	(4)	(1)	(16)
Purchase and retirement of common stock	(167)	(246)	(478)	(671)
Stock based compensation	166	198	473	594
Retained Earnings [Member]
Beginning of period	122,597	127,807	122,847	139,354
End of period	121,583	121,388	121,583	121,388
Purchase and retirement of common stock	(81)	(158)	(627)	(158)
Net income (loss) for the period	801	(4,505)	4,573	(12,899)
Cash dividends declared and paid	(1,734)	(1,756)	(5,210)	(4,909)
AOCI Attributable to Parent [Member]
Beginning of period	769	(7)	793	152
End of period	757	(25)	757	(25)
Amortization of pension costs, net of tax	(12)	6	(36)	21
AOCI Attributable to Parent [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning of period	$ 0	$ (24)	$ 0	$ (198)