Note 16 - Changes to Stockholders' Equity - Changes Occurred in Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 29, 2021	May 30, 2020	May 29, 2021	May 30, 2020
Balance			$ 158,030
Balance	$ 160,262		160,262
Net income (loss) for the period	5,974	$ (20,352)	9,985	$ (19,142)
Common Stock [Member]
Balance	49,567	50,173	49,714	50,581
Issuance of common stock	89	89	120	118
Forfeited shares	0	0	0	(35)
Purchase and retirement of common stock	(394)	(285)	(572)	(687)
Balance	$ 49,262	$ 49,977	$ 49,262	$ 49,977
Balance, shares (in shares)	9,913,496	10,034,591	9,942,787	10,116,291
Issuance of common stock, shares (in shares)	17,815	17,765	24,036	23,508
Forfeited shares (in shares)	0	0	0	(7,000)
Purchase and retirement of common stock, shares (in shares)	(78,952)	(57,000)	(114,464)	(137,443)
Balance, shares (in shares)	9,852,359	9,995,356	9,852,359	9,995,356
Paid in Capital [Member]
Balance	$ 0	$ 0	$ 0	$ 195
Issuance of common stock	42	(7)	94	39
Forfeited shares	0	0	0	35
Purchase and retirement of common stock	(90)	(102)	(156)	(463)
Balance	0	0	0	0
Stock based compensation	48	109	62	194
Retained Earnings [Member]
Balance	109,493	125,078	109,710	129,130
Purchase and retirement of common stock	(1,907)	(87)	(2,415)	(304)
Balance	112,325	103,391	112,325	103,391
Cumulative effect of a change in accounting principal	0	0	0	(3,785)
Net income (loss) for the period	5,974	(20,352)	9,985	(19,142)
Cash dividends declared	(1,235)	(1,248)	(4,955)	(2,508)
AOCI Attributable to Parent [Member]
Balance	(1,359)	(1,211)	(1,394)	(1,236)
Balance	(1,325)	(1,187)	(1,325)	(1,187)
Amortization of pension costs, net of tax	$ 34	$ 24	$ 69	$ 49