Note 14 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Nov. 30, 2019	Nov. 24, 2018	Nov. 25, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	22.20%	35.00%
Tax Cuts and Jobs Act of 2017 Provisional Adjustment of Deferred Tax Asset Liability		$ 1,331,000
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount	$ 22,000	223,000	$ 554,000
Income Taxes Paid, Net, Total	$ 1,228,000	$ 1,431,000	$ 7,516,000
Open Tax Year	2016 2017 2018 2019
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 4,095
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards, Expiration Year	2021
State and Local Jurisdiction [Member] | Latest Tax Year [Member]
Operating Loss Carryforwards, Expiration Year	2027