Note 15 - Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Feb. 28, 2015
Note 15 - Segment Information (Details) [Line Items]
Number of Reportable Segments	3us-gaap_NumberOfReportableSegments
Zenith Freight Lines [Member]
Note 15 - Segment Information (Details) [Line Items]
Business Combination, Pro Forma Information, Operating Costs of Acquiree since Acquisition Date, Actual	6,007

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