Note 5 - Accounting for Share-based Compensation - Deferred Compensation Units (Details)	3 Months Ended
	Mar. 02, 2019 shares
Units outstanding (in shares)	509,522
Participant contributions (in shares)	6,917
Company match contributions (in shares)	692
Payouts (in shares)	(2,221)
Units outstanding (in shares)	514,910
Non Employee Directors [Member]
Units outstanding (in shares)	479,787
Participant contributions (in shares)	4,717
Company match contributions (in shares)	472
Payouts (in shares)
Units outstanding (in shares)	484,976
Employees [Member]
Units outstanding (in shares)	29,735
Participant contributions (in shares)	2,200
Company match contributions (in shares)	220
Payouts (in shares)	(2,221)
Units outstanding (in shares)	29,934