Note 14 - Changes to Stockholders' Equity - Changes Occurred in Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2024	Aug. 26, 2023	Aug. 31, 2024	Aug. 26, 2023
Beginning of period			$ 183,441
End of period	$ 165,036		165,036
Net income for the period	(4,505)	$ (2,591)	(12,899)	$ 930
Amortization of pension costs, net of tax	(16)	(31)	(46)	(98)
Common Stock [Member]
Beginning of period	43,808	43,900	43,842	44,759
Issuance of common stock	100	101	291	288
Purchase and retirement of common stock	(234)	(201)	(459)	(1,247)
End of period	$ 43,674	$ 43,800	$ 43,674	$ 43,800
Beginning of period (in shares)	8,761,332	8,779,912	8,768,221	8,951,839
Issuance of common stock (in shares)	20,139	19,996	58,256	57,406
Purchase and retirement of common stock (in shares)	(46,843)	(40,143)	(91,849)	(249,480)
End of period (in shares)	8,734,628	8,759,765	8,734,628	8,759,765
Additional Paid-in Capital [Member]
Beginning of period	$ 52	$ 0	$ 93	$ 0
End of period	0	0	0	0
Issuance of common stock	(4)	(2)	(16)	(12)
Purchase and retirement of common stock	(246)	(210)	(671)	(624)
Stock based compensation	198	212	594	636
Retained Earnings [Member]
Beginning of period	127,807	149,393	139,354	150,800
End of period	121,388	145,031	121,388	145,031
Purchase and retirement of common stock	(158)	(196)	(158)	(2,293)
Net income for the period	(4,505)	(2,591)	(12,899)	930
Cash dividends declared	(1,756)	(1,575)	(4,909)	(4,406)
AOCI Attributable to Parent [Member]
Beginning of period	(7)	(108)	152	50
End of period	(25)	(54)	(25)	(54)
Amortization of pension costs, net of tax	6	23	21	70
AOCI Attributable to Parent [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning of period	$ (24)	$ 31	$ (198)	$ (174)