Note 8 - Accounting for Share-based Compensation - Deferred Compensation Units (Details)	6 Months Ended
	Jun. 03, 2017 shares
Units outstanding (in shares)	465,435
Participant contributions (in shares)	12,955
Company match contributions (in shares)	1,295
Payouts (in shares)	(21,855)
Units outstanding (in shares)	457,830
Non Employee Directors [Member]
Units outstanding (in shares)	424,319
Participant contributions (in shares)	8,373
Company match contributions (in shares)	837
Payouts (in shares)	(14,143)
Units outstanding (in shares)	419,386
Employees [Member]
Units outstanding (in shares)	41,116
Participant contributions (in shares)	4,582
Company match contributions (in shares)	458
Payouts (in shares)	(7,712)
Units outstanding (in shares)	38,444