Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Nov. 28, 2020	Nov. 30, 2019	Nov. 24, 2018	Nov. 25, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	22.20%	35.00%
Tax Cuts and Jobs Act of 2017 Provisional Adjustment of Deferred Tax Asset Liability			$ 1,331
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount	$ (114)	$ 22	223
Income Taxes Paid, Net, Total	539	$ 1,228	$ 1,431
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 26,407
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards, Expiration Year	2022
State and Local Jurisdiction [Member] | Latest Tax Year [Member]
Operating Loss Carryforwards, Expiration Year	2027