Note 11 - Earnings Per Share - Reconciliation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 27, 2022	Aug. 28, 2021	Aug. 27, 2022	Aug. 28, 2021
Unvested shares (in shares)	15,799	0	67,099	7,105
Basic earnings per share - continuing operations, net income	$ 7,773	$ 3,441	$ 19,807	$ 12,216
Basic earnings per share - continuing operations, weighted average shares (in shares)	9,238,185	9,779,928	9,503,937	9,864,691
Income from continuing operations (in dollars per share)	$ 0.84	$ 0.35	$ 2.08	$ 1.24
Restricted shares (in shares)	28,927	5,415	5,688	9,329
Diluted earnings per share - continuing operations, net income	$ 7,773	$ 3,441	$ 19,807	$ 12,216
Diluted earnings per share - continuing operations, weighted average shares (in shares)	9,267,112	9,785,343	9,509,625	9,874,020
Diluted earnings per share - continuing operations, net income per share (in dollars per share)	$ 0.84	$ 0.35	$ 2.08	$ 1.24
Basic loss per share - discontinued operations, net income	$ (145)	$ (425)	$ 40,512	$ 785
Income (loss) from discontinued operations (in dollars per share)	$ (0.02)	$ (0.04)	$ 4.26	$ 0.08
Diluted loss per share - discontinued operations, net income	$ (145)	$ (425)	$ 40,512	$ 785
Diluted loss per share - discontinued operations, net income per share (in dollars per share)	$ (0.02)	$ (0.04)	$ 4.26	$ 0.08
Discontinued Operations [Member]
Basic earnings per share - continuing operations, weighted average shares (in shares)	9,238,185	9,779,928	9,503,937	9,864,691
Restricted shares (in shares)	28,927	5,415	5,688	9,329
Diluted earnings per share - continuing operations, weighted average shares (in shares)	9,267,112	9,785,343	9,509,625	9,874,020