Note 11 - Earnings Per Share - Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Aug. 29, 2020	Aug. 31, 2019	Aug. 29, 2020	Aug. 31, 2019
Basic (in shares)	52,130	50,939	51,959	50,864
Equivalent shares from share-based compensations plans (in shares)	461	563	441	972
Weighted-average common and common equivalent shares diluted (in shares)	52,591	51,502	52,400	51,836