Note 15 - Changes to Stockholders' Equity - Changes Occurred in Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 27, 2023	May 28, 2022	May 27, 2023	May 28, 2022
Beginning of period			$ 195,609
End of period	$ 193,185		193,185
Net income for the period	2,076	$ 47,118	3,521	$ 52,691
Amortization of pension costs, net of tax	(31)	(33)	(63)	(66)
Common Stock [Member]
Beginning of period	44,311	48,640	44,759	48,811
Issuance of common stock	95	70	187	124
Purchase and retirement of common stock	(506)	(2,314)	(1,046)	(2,539)
End of period	$ 43,900	$ 46,396	$ 43,900	$ 46,396
Beginning of period (in shares)	8,862,137	9,727,932	8,951,839	9,762,125
Issuance of common stock (in shares)	19,029	14,180	37,410	24,976
Purchase and retirement of common stock (in shares)	(101,254)	(462,844)	(209,337)	(507,833)
End of period (in shares)	8,779,912	9,279,268	8,779,912	9,279,268
Additional Paid-in Capital [Member]
Beginning of period	$ 0	$ 0	$ 0	$ 113
Issuance of common stock	2	13	10	52
Purchase and retirement of common stock	(214)	(155)	(414)	(422)
End of period	0	0	0	0
Stock based compensation	212	142	424	257
Retained Earnings [Member]
Beginning of period	149,611	119,557	150,800	115,631
Purchase and retirement of common stock	(884)	(5,408)	(2,097)	(5,681)
End of period	149,393	145,471	149,393	145,471
Net income for the period	2,076	47,118	3,521	52,691
Cash dividends declared	(1,410)	(15,796)	(2,831)	(17,170)
AOCI Attributable to Parent [Member]
Beginning of period	(62)	(1,774)	50	(1,823)
End of period	(108)	(1,726)	(108)	(1,726)
Amortization of pension costs, net of tax	23	48	47	97
AOCI Attributable to Parent [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning of period	$ (69)	$ 0	$ (205)	$ 0