Note 14 - Income Taxes (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Feb. 27, 2016	Nov. 26, 2016	Nov. 28, 2015	Nov. 29, 2014	Nov. 30, 2013
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			$ 1,998,000	$ 300,000
Income Tax Benefit from Share-based Compensation, Adoption of Accounting Policy	$ 87,000
Deferred Tax Assets, Valuation Allowance		$ 0	0		$ 1,044,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			70,000	$ 974,000
Effect Of Change In Deferred Tax Assets Valuation Allowance On Basic Earnings Per Share				$ 0.09
Income Taxes Paid, Net		9,949,000	5,906,000	$ 2,367,000
Unrecognized Tax Benefits Excluding Interest And Penalties				1,236,000
Unrecognized Tax Benefits Interest Expense Recovery		15,000	(144,000)	7,000
Unrecognized Tax Benefits Income Tax Penalties Expense Recovery		10,000	$ 3,000	$ 10,000
State and Local Jurisdiction [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration		$ 9,057,000
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards, Expiration Year		2017
State and Local Jurisdiction [Member] | Latest Tax Year [Member]
Operating Loss Carryforwards, Expiration Year		2030