Note 8 - Accounting for Share-based Compensation - Deferred Compensation Units (Details)	3 Months Ended
	Mar. 04, 2017 shares
Units outstanding (in shares)	465,435
Participant contributions (in shares)	8,426
Company match contributions (in shares)	843
Payouts (in shares)	(19,955)
Units outstanding (in shares)	454,749
Non Employee Directors [Member]
Units outstanding (in shares)	424,319
Participant contributions (in shares)	4,462
Company match contributions (in shares)	446
Payouts (in shares)	(13,818)
Units outstanding (in shares)	415,409
Employees [Member]
Units outstanding (in shares)	41,116
Participant contributions (in shares)	3,964
Company match contributions (in shares)	397
Payouts (in shares)	(6,137)
Units outstanding (in shares)	39,340