Note 13 - Capital Stock and Stock Compensation - Additional Information Regarding Activity in Stock Options (Details) - USD ($)		12 Months Ended
		Nov. 26, 2016	Nov. 28, 2015	Nov. 29, 2014
Total intrinsic value of options exercised		$ 124,000	$ 5,934,000	$ 236,000
Total fair value of options vested			87,000	200,000
Total cash received from the exercise of options		114,000	4,031,000	297,000
Excess tax benefits recognized as additional paid-in capital upon the exercise of options (1)			1,998,000	300,000
Employee Stock Option [Member]
Excess tax benefits recognized as additional paid-in capital upon the exercise of options (1)	[1]		$ 1,899,000	$ 72,000

[1] Prior to the adoption of ASU 2016-09 in the first quarter of fiscal 2016. See Note 2.