Note 1 - Basis of Presentation (Details)	May. 30, 2015	Feb. 02, 2015	Feb. 01, 2015
Zenith Freight Lines [Member]
Note 1 - Basis of Presentation (Details) [Line Items]
Equity Method Investment, Ownership Percentage			49.00%
Zenith Freight Lines [Member]
Note 1 - Basis of Presentation (Details) [Line Items]
Equity Method Investment, Ownership Percentage	49.00%
Business Acquisition, Percentage of Voting Interests Acquired	51.00%	51.00%