Note 13 - Additional Information Regarding Activity in Stock Options (Details) - USD ($)	12 Months Ended
	Nov. 28, 2015	Nov. 29, 2014	Nov. 30, 2013
Employee Stock Option [Member]
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ 1,899,000	$ 72,000	$ 106,000
Total intrinsic value of options exercised	5,934,000	236,000	387,000
Total fair value of options vested	87,000	200,000	363,000
Total cash received from the exercise of options	4,031,000	297,000	313,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ 1,998,000	$ 300,000	$ 313,000