Note 3 - Business Combination - Acquisition of Zenith (Details) - Acquired Identifiable Intangible Assets - 6 months ended May. 30, 2015 - Zenith Freight Lines [Member] - USD ($) $ in Thousands	Total
Note 3 - Business Combination - Acquisition of Zenith (Details) - Acquired Identifiable Intangible Assets [Line Items]
Fair Value	$ 6,362
Trade Names [Member]
Note 3 - Business Combination - Acquisition of Zenith (Details) - Acquired Identifiable Intangible Assets [Line Items]
Trade names	Indefinite
Trade names	$ 2,490
Customer Relationships [Member]
Note 3 - Business Combination - Acquisition of Zenith (Details) - Acquired Identifiable Intangible Assets [Line Items]
Useful Life	15 years
Fair Value	$ 3,038
Technology-Based Intangible Assets [Member]
Note 3 - Business Combination - Acquisition of Zenith (Details) - Acquired Identifiable Intangible Assets [Line Items]
Useful Life	7 years
Fair Value	$ 834