Note 3 - Accounting for Share-Based Compensation - Deferred Compensation Units (Details) - shares		12 Months Ended
		Nov. 28, 2015	Nov. 29, 2014
Non Employee Directors [Member]
Units outstanding (in shares)		342,547	312,680
Participant contributions (in shares)		16,312	14,347
Company match contributions (in shares)	[1]	21,636	16,613
Payouts (in shares)		(325)	(1,093)
Units outstanding (in shares)		380,170	342,547
Employees [Member]
Units outstanding (in shares)		52,303	61,288
Participant contributions (in shares)		4,705	4,429
Company match contributions (in shares)	[1]	470	492
Payouts (in shares)		(11,572)	(13,906)
Units outstanding (in shares)		45,906	52,303
Units outstanding (in shares)		394,850	373,968
Participant contributions (in shares)		21,017	18,776
Company match contributions (in shares)	[1]	22,106	17,105
Payouts (in shares)		(11,897)	(14,999)
Units outstanding (in shares)		426,076	394,850

[1] The non-employee directors' company match includes 20,005 and 15,019 deferred compensation units paid as discretionary awards to all non-employee directors in 2015 and 2014, respectively.