Note 13 - Segment Information (Details Textual) $ in Thousands	3 Months Ended	9 Months Ended
Aug. 29, 2020 USD ($)	Aug. 31, 2019 USD ($)	Aug. 29, 2020 USD ($)	Aug. 31, 2019 USD ($)
Number of Reportable Segments			3
SGA Expenses Excluding New Store Pre-opening Costs	$ 50,394	$ 63,519	$ 165,407	$ 197,495
Zenith Freight Lines [Member]
SGA Expenses Excluding New Store Pre-opening Costs	$ 16,826	$ 18,289	$ 54,407	$ 59,169

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration