Note 15 - Changes to Stockholders' Equity - Changes Occurred in Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	May 30, 2020	Jun. 01, 2019	Jun. 01, 2019	May 30, 2020	Jun. 01, 2019
Balance				$ 178,670
Balance	$ 152,181			152,181
Net income (loss) for the period	(20,352)	$ 445	$ 445	(19,142)	$ 1,053
Cash dividends declared	(1,248)	(1,312)		(2,508)	(2,603)
Common Stock [Member]
Balance	50,173	52,598		50,581	52,638
Issuance of common stock	89	64		118	281
Forfeited shares	0	0		(35)
Purchase and retirement of common stock	(285)	(400)		(687)	(657)
Balance	$ 49,977	$ 52,262	$ 52,262	$ 49,977	$ 52,262
Balance, shares (in shares)	10,034,591	10,519,640		10,116,291	10,527,636
Issuance of common stock, shares (in shares)	17,765	12,729		23,508	56,201
Forfeited shares (in shares)	0	0		(7,000)	0
Purchase and retirement of common stock, shares (in shares)	(57,000)	(80,024)		(137,443)	(131,492)
Balance, shares (in shares)	9,995,356	10,452,345	10,452,345	9,995,356	10,452,345
Paid in Capital [Member]
Balance	$ 0	$ 0		$ 195	$ 0
Issuance of common stock	(7)	21		39	(97)
Forfeited shares	0	0		35	0
Purchase and retirement of common stock	(102)	(242)		(463)	(379)
Balance	0	0	$ 0	0	0
Stock based compensation	109	221		194	476
Retained Earnings [Member]
Balance	125,078	138,687		129,130	140,009
Purchase and retirement of common stock	(87)	(693)		(304)	(1,311)
Balance	103,391	137,127	137,127	103,391	137,127
Cumulative effect of a change in accounting principal	0	0		(3,785)	(21)
Net income (loss) for the period	(20,352)	445		(19,142)	1,053
AOCI Attributable to Parent [Member]
Balance	(1,211)	(2,280)		(1,236)	(2,338)
Balance	(1,187)	(2,223)	$ (2,223)	(1,187)	(2,223)
Amortization of pension costs, net of tax	$ 24	$ 57		$ 49	$ 115