Note 9 - Accounting for Share-based Compensation - Deferred Compensation Units (Details) - shares		12 Months Ended
		Nov. 30, 2024	Dec. 02, 2023	Dec. 03, 2022
Units outstanding (in shares)		459,157	522,564	516,885
Participant contributions (in shares)		22,412	25,406	102,039
Company match contributions1 (in shares)	[1]	16,167	20,121	28,142
Payouts (in shares)		(29,048)	(108,934)	(124,502)
Units outstanding (in shares)		468,688	459,157	522,564
Non Employee Directors [Member]
Units outstanding (in shares)		395,970	465,992	468,524
Participant contributions (in shares)		13,103	13,187	89,054
Company match contributions1 (in shares)	[1]	15,236	18,899	26,843
Payouts (in shares)		(20,691)	(102,108)	(118,429)
Units outstanding (in shares)		403,618	395,970	465,992
Employees [Member]
Units outstanding (in shares)		63,187	56,572	48,361
Participant contributions (in shares)		9,309	12,219	12,985
Company match contributions1 (in shares)	[1]	931	1,222	1,299
Payouts (in shares)		(8,357)	(6,826)	(6,073)
Units outstanding (in shares)		65,070	63,187	56,572

[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.