Note 14 - Income Taxes - Reconciliation of Statutory Federal Income Tax Rate and Effective Income Tax Rate (Details)	12 Months Ended
	Nov. 26, 2016	Nov. 28, 2015	Nov. 29, 2014
Statutory federal income tax rate	35.00%	35.00%	35.00%
Adjustments to state net operating loss carryforwards			3.30%
Change in income tax valuation allowance		(0.10%)	(3.70%)
Change in income tax reserves		0.10%	(1.70%)
State income tax, net of federal benefit	4.20%	4.40%	4.90%
Benefit of goodwill basis difference		(3.20%)
Excess tax benefits from stock-based compensation	(0.30%)
Other	(0.30%)	(0.30%)	(1.50%)
Effective income tax rate	38.60%	35.90%	36.30%