Note 15 - Changes to Stockholders' Equity - Changes Occurred in Stockholders' Equity (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 02, 2019	Feb. 24, 2018
Balance	$ 190,309
Balance	189,005
Net income (loss) for the period	608	$ (913)
Common Stock [Member]
Balance	52,638	53,690
Issuance of common stock	217	193
Purchase and retirement of common stock	(257)	(107)
Balance	$ 52,598	$ 53,776
Balance, shares (in shares)	10,527,636	10,737,950
Issuance of common stock, shares (in shares)	43,472	38,641
Purchase and retirement of common stock, shares (in shares)	(51,468)	(21,300)
Balance, shares (in shares)	10,519,640	10,755,291
Additional Paid-in Capital [Member]
Balance		$ 962
Issuance of common stock	(118)	(109)
Purchase and retirement of common stock	(137)	(659)
Balance		499
Stock based compensation	255	305
Retained Earnings [Member]
Balance	140,009	139,378
Purchase and retirement of common stock	(618)
Balance	138,687	137,827
Cumulative effect of a change in accounting principal	(21)
Reclassification of certain tax effects from accumulated other comprehensive loss		545
Net income (loss) for the period	608	(913)
Cash dividends	(1,291)	(1,183)
AOCI Attributable to Parent [Member]
Balance	(2,338)	(2,570)
Balance	(2,280)	(3,036)
Reclassification of certain tax effects from accumulated other comprehensive loss		(545)
Amortization of pension costs, net of tax	$ 58	$ 79