Note 14 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Nov. 28, 2015	Nov. 29, 2014	Nov. 30, 2013
State and Local Jurisdiction [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	$ 12,715,000
Other Current Assets [Member]
Liability for Uncertain Tax Positions, Current		$ 1,370,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	1,998,000	300,000	$ 313,000
Deferred Tax Assets, Valuation Allowance	0	70,000	1,044,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	70,000	$ 974,000	(136,000)
Effect Of Change In Deferred Tax Assets Valuation Allowance On Basic Earnings Per Share		$ 0.09
Income Taxes Paid, Net	5,906,000	$ 2,367,000	2,723,000
Unrecognized Tax Benefits Excluding Interest And Penalties		1,236,000
Unrecognized Tax Benefits Interest Expense Recovery	(144,000)	7,000	23,000
Unrecognized Tax Benefits Income Tax Penalties Expense Recovery	$ 3,000	$ 10,000	$ 31,000