Note 15 - Changes to Stockholders' Equity - Changes Occurred in Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 26, 2022	Feb. 27, 2021
Balance	$ 162,732
Balance	166,423
Net income	5,573	$ 4,011
Common Stock [Member]
Balance	48,811	49,714
Issuance of common stock	54	31
Purchase and retirement of common stock	(225)	(178)
Balance	$ 48,640	$ 49,567
Balance, shares (in shares)	9,762,125	9,942,787
Issuance of common stock, shares (in shares)	10,796	6,221
Purchase and retirement of common stock, shares (in shares)	(44,989)	(35,512)
Balance, shares (in shares)	9,727,932	9,913,496
Paid in Capital [Member]
Balance	$ 113	$ 0
Issuance of common stock	39	52
Purchase and retirement of common stock	(267)	(66)
Balance	0	0
Stock based compensation	115	14
Retained Earnings [Member]
Balance	115,631	109,710
Purchase and retirement of common stock	(273)	(509)
Balance	119,557	109,493
Net income	5,573	4,011
Cash dividends declared	(1,374)	(3,719)
AOCI Attributable to Parent [Member]
Balance	(1,823)	(1,394)
Balance	(1,774)	(1,359)
Amortization of pension costs, net of tax	$ 49	$ 35