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

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant