Note 8 - Accounting for Share-based Compensation - Deferred Compensation Units (Details)	6 Months Ended
	Jun. 02, 2018 shares
Units outstanding (in shares)	475,176
Participant contributions (in shares)	13,410
Company match contributions (in shares)	1,341
Payouts (in shares)	(5,559)
Units outstanding (in shares)	484,368
Non Employee Directors [Member]
Units outstanding (in shares)	443,570
Participant contributions (in shares)	8,058
Company match contributions (in shares)	806
Payouts (in shares)
Units outstanding (in shares)	452,434
Employees [Member]
Units outstanding (in shares)	31,606
Participant contributions (in shares)	5,352
Company match contributions (in shares)	535
Payouts (in shares)	(5,559)
Units outstanding (in shares)	31,934