Note 16 - Changes to Stockholders' Equity - Changes Occurred in Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 27, 2022	Aug. 28, 2021	Aug. 27, 2022	Aug. 28, 2021
Beginning of period			$ 162,732
Net income	$ 7,628	$ 3,016	60,319	$ 13,001
End of period	194,939		194,939
Common Stock [Member]
Beginning of period	46,396	49,262	48,811	49,714
Issuance of common stock	98	23	222	143
Purchase and retirement of common stock	$ (430)	$ (506)	$ (2,969)	$ (1,078)
Beginning of period (in shares)	9,279,268	9,852,359	9,762,125	9,942,787
Issuance of common stock (in shares)	19,568	4,587	44,544	28,623
Purchase and retirement of common stock (in shares)	(86,096)	(101,100)	(593,929)	(215,564)
End of period (in shares)	9,212,740	9,755,846	9,212,740	9,755,846
End of period	$ 46,064	$ 48,779	$ 46,064	$ 48,779
Additional Paid-in Capital [Member]
Beginning of period	0	0	113	0
Issuance of common stock	65	71	117	165
Purchase and retirement of common stock	(207)	(119)	(629)	(275)
Stock based compensation	142	48	399	110
End of period	0	0	0	0
Retained Earnings [Member]
Beginning of period	145,471	112,325	115,631	109,710
Purchase and retirement of common stock	(982)	(2,017)	(6,663)	(4,432)
Net income	7,628	3,016	60,319	13,001
Cash dividends declared	(1,564)	(1,366)	(18,734)	(6,321)
End of period	150,553	111,958	150,553	111,958
AOCI Attributable to Parent [Member]
Beginning of period	(1,726)	(1,325)	(1,823)	(1,394)
Amortization of pension costs, net of tax	48	35	145	104
End of period	$ (1,678)	$ (1,290)	$ (1,678)	$ (1,290)