Note 5 - Acquisition (Details) (Terrafirma Roadways [Member]) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
Dec. 31, 2013 USD ($)	Dec. 31, 2013	Dec. 31, 2013 Maximum [Member] USD ($)	Dec. 31, 2013 Maximum [Member] GBP (£)
Note 5 - Acquisition (Details) [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 6.8
Business Acquisition Contingent Consideration Potential Cash Payment1			$ 1.6	£ 1.0
Business Acquisition Period		18 months

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration