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. 26, 2022	Nov. 27, 2021	Nov. 28, 2020
Net income (loss) from continuing operations		$ 25,360	$ 16,921	$ (11,477)
Denominator for basic income per share - weighted average shares (in shares)		9,394,873	9,835,829	9,969,616
Effect of dilutive securities* (in shares)	[1]	8,107	7,945	0
Denominator for diluted income per share — weighted average shares and assumed conversions (in shares)		9,402,980	9,843,774	9,969,616
Basic income (loss) per share - continuing operations: (in dollars per share)		$ 2.70	$ 1.72	$ (1.15)
Diluted income (loss) per share - continuing operations (in dollars per share)		$ 2.70	$ 1.72	$ (1.15)
Net income from discontinued operations		$ 39,985	$ 1,121	$ 1,056
Denominator for basic income per share - weighted average shares (in shares)		9,394,873	9,835,829	9,969,616
Basic income per share - discontinued operations (in dollars per share)		$ 4.26	$ 0.11	$ 0.11
Diluted income per share - discontinued operations (in dollars per share)		$ 4.26	$ 0.11	$ 0.11

[1] Due to the net losses in 2020, the potentially dilutive securities would have been anti-dilutive and are therefore excluded.