Note 9 - Accounting for Share-based Compensation - Deferred Compensation Units (Details) - shares		12 Months Ended
		Dec. 02, 2023	Dec. 03, 2022	Nov. 27, 2021
Units outstanding (in shares)		522,564	516,885	499,818
Participant contributions (in shares)		25,406	102,039	23,523
Company match contributions1 (in shares)	[1]	20,121	28,142	21,167
Payouts (in shares)		(108,934)	(124,502)	(27,623)
Units outstanding (in shares)		459,157	522,564	516,885
Non Employee Directors [Member]
Units outstanding (in shares)		465,992	468,524	455,265
Participant contributions (in shares)		13,187	89,054	13,036
Company match contributions1 (in shares)	[1]	18,899	26,843	20,118
Payouts (in shares)		(102,108)	(118,429)	(19,895)
Units outstanding (in shares)		395,970	465,992	468,524
Employees [Member]
Units outstanding (in shares)		56,572	48,361	44,553
Participant contributions (in shares)		12,219	12,985	10,487
Company match contributions1 (in shares)	[1]	1,222	1,299	1,049
Payouts (in shares)		(6,826)	(6,073)	(7,728)
Units outstanding (in shares)		63,187	56,572	48,361

[1] The non-employee directors’ company match includes 17,937, 18,814 and 21,323 deferred compensation units paid as discretionary awards to all non-employee directors in 2022, 2021 and 2020, respectively.