Note 2 - Interim Financial Presentation (Details Textual)	3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 29, 2020	Aug. 31, 2019	Aug. 29, 2020	Aug. 31, 2019	Nov. 30, 2019	Nov. 24, 2018
Effective Income Tax Rate Reconciliation, Percent, Total	36.80%	30.50%	(36.50%)	28.40%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					21.00%	35.00%