Note 16 - Earnings (Loss) Per Share - Reconciliation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended											12 Months Ended
		Nov. 27, 2021	Aug. 28, 2021	May 29, 2021	Feb. 27, 2021	Nov. 28, 2020	[1]	Aug. 29, 2020	[2]	May 30, 2020	[3]	Feb. 29, 2020	Nov. 27, 2021	Nov. 28, 2020	Nov. 30, 2019
Net income (loss)		$ 5,041	$ 3,016	$ 5,974	$ 4,011	$ 6,543		$ 2,178		$ (20,352)		$ 1,210	$ 18,042	$ (10,421)	$ (1,928)
Denominator for basic income per share - weighted average shares (in shares)													9,835,829	9,969,616	10,285,511
Effect of dilutive securities* (in shares)	[4]												7,945	0	0
Denominator for diluted income per share — weighted average shares and assumed conversions (in shares)													9,843,774	9,969,616	10,285,511
Basic income (loss) per share (in dollars per share)		$ 0.52	$ 0.31	$ 0.60	$ 0.40	$ 0.65		$ 0.22		$ (2.04)		$ 0.12	$ 1.83	$ (1.05)	$ (0.19)
Diluted income (loss) per share (in dollars per share)		$ 0.52	$ 0.31	$ 0.60	$ 0.40	$ 0.65		$ 0.22		$ (2.04)		$ 0.12	$ 1.83	$ (1.05)	$ (0.19)

[1] Income from operations includes a gain of $1,161 arising from the settlement of a lease obligation (see Note 13).

[2] Net income includes a non-taxable gain of $914 arising from the recognition of a death benefit from Company-owned life insurance (see Note 13).

[3] Loss from operations reflects the severe impact of the COVID-19 pandemic on our operations due to the temporary closure of substantially all of our operations during the quarter (see Note 1) and includes a goodwill impairment charge of $1,971 (see Note 7), asset impairment charges of $12,184 and a litigation expense accrual of $1,050 (see Note 13). Net loss includes the benefit of carrying back the loss to tax years with 35% federal statutory rate as provided for in the CARES Act (see Note 12).

[4] Due to the net losses in 2020 and 2019, the potentially dilutive securities would have been anti-dilutive and are therefore excluded.