Note 15 - Changes to Stockholders' Equity - Changes Occurred in Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 28, 2022	May 29, 2021	May 28, 2022	May 29, 2021
Balance			$ 162,732
Balance	$ 190,141		190,141
Net income for the period	47,118	$ 5,974	52,691	$ 9,985
Common Stock [Member]
Balance	48,640	49,567	48,811	49,714
Issuance of common stock	70	89	124	120
Purchase and retirement of common stock	(2,314)	(394)	(2,539)	(572)
Balance	$ 46,396	$ 49,262	$ 46,396	$ 49,262
Balance, shares (in shares)	9,727,932	9,913,496	9,762,125	9,942,787
Issuance of common stock, shares (in shares)	14,180	17,815	24,976	24,036
Purchase and retirement of common stock, shares (in shares)	(462,844)	(78,952)	(507,833)	(114,464)
Balance, shares (in shares)	9,279,268	9,852,359	9,279,268	9,852,359
Additional Paid-in Capital [Member]
Balance	$ 0	$ 0	$ 113	$ 0
Issuance of common stock	13	42	52	94
Purchase and retirement of common stock	(155)	(90)	(422)	(156)
Balance	0	0	0	0
Stock based compensation	142	48	257	62
Retained Earnings [Member]
Balance	119,557	109,493	115,631	109,710
Purchase and retirement of common stock	(5,408)	(1,907)	(5,681)	(2,415)
Balance	145,471	112,325	145,471	112,325
Net income for the period	47,118	5,974	52,691	9,985
Cash dividends declared	(15,796)	(1,235)	(17,170)	(4,955)
AOCI Attributable to Parent [Member]
Balance	(1,774)	(1,359)	(1,823)	(1,394)
Balance	(1,726)	(1,325)	(1,726)	(1,325)
Amortization of pension costs, net of tax	$ 48	$ 34	$ 97	$ 69