Note 11 - Earnings (Loss) Per Share - Reconciliation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 26, 2023	Aug. 27, 2022	Aug. 26, 2023	Aug. 27, 2022
Basic loss per share - continuing operations, Net Income	$ (2,591)	$ 7,773	$ 930	$ 19,807
Basic loss per share - continuing operations, Weighted Average Shares (in shares)	8,736,096	9,238,185	8,804,718	9,503,937
Basic loss per share - continuing operations, Net Income Per Share (in dollars per share)	$ (0.30)	$ 0.84	$ 0.11	$ 2.08
Options and restricted shares, Weighted Average Shares (in shares)	0	28,927	15,934	5,688
Diluted loss per share - continuing operations, Net Income	$ (2,591)	$ 7,773	$ 930	$ 19,807
Diluted loss per share - continuing operations, Weighted Average Shares (in shares)	8,736,096	9,267,112	8,820,652	9,509,625
Diluted loss per share - continuing operations, Net Income Per Share (in dollars per share)	$ (0.30)	$ 0.84	$ 0.11	$ 2.08
Basic loss per share - discontinued operations, Net Income		$ (145)		$ 40,512
Basic loss per share - discontinued operations, Net Income Per Share (in dollars per share)		$ (0.02)		$ 4.26
Diluted loss per share - discontinued operations, Net Income		$ (145)		$ 40,512
Diluted loss per share - discontinued operations, Net Income Per Share (in dollars per share)		$ (0.02)		$ 4.26
Discontinued Operations [Member]
Basic loss per share - continuing operations, Weighted Average Shares (in shares)		9,238,185		9,503,937
Options and restricted shares, Weighted Average Shares (in shares)		0		5,688
Diluted loss per share - continuing operations, Weighted Average Shares (in shares)		9,238,185		9,509,625