Note 17 - Earnings (Loss) Per Share - Reconciliation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Nov. 30, 2024	Nov. 25, 2023	Nov. 26, 2022
Net income (loss) from continuing operations		$ (9,695)	$ (3,171)	$ 25,360
Denominator for basic income per share - weighted average shares (in shares)		8,733,215	8,784,759	9,394,873
Effect of dilutive securities* (in shares)	[1]	0	0	8,107
Denominator for diluted income per share — weighted average shares and assumed conversions (in shares)		8,733,215	8,784,759	9,402,980
Basic income (loss) per share - continuing operations: (in dollars per share)		$ (1.11)	$ (0.36)	$ 2.7
Diluted income (loss) per share - continuing operations (in dollars per share)		$ (1.11)	$ (0.36)	$ 2.7
Net income from discontinued operations		$ 0	$ 0	$ 39,985
Denominator for basic income per share - weighted average shares (in shares)		8,733,215	8,784,759	9,394,873
Effect of dilutive securities* (in shares)	[1]	0	0	8,107
Denominator for diluted income per share — weighted average shares and assumed conversions (in shares)		8,733,215	8,784,759	9,402,980
Basic income per share - discontinued operations (in dollars per share)		$ 0	$ 0	$ 4.26
Diluted income per share - discontinued operations (in dollars per share)		$ 0	$ 0	$ 4.25

[1] Due to the net loss in 2024 and 2023, the potentially dilutive securities would have been anti-dilutive and are therefore excluded.