Note 14 - Segment Information (Details Textual) $ in Thousands	3 Months Ended	6 Months Ended
May 28, 2016 USD ($)	Feb. 27, 2016	May 30, 2015 USD ($)	May 28, 2016 USD ($)	May 30, 2015 USD ($)
Zenith Freight Lines [Member]
Business Combination, Pro Forma Information Operating Costs of Acquiree Since Acquisition Date, Actual	$ 23,149		$ 20,931	$ 47,084	$ 26,938
Number of Reportable Segments		3

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.

No definition available.

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