Note 1 - Summary of Significant Accounting Policies (Details) - Estimated Useful Lives	12 Months Ended
	Dec. 31, 2014
Tractors [Member]
Property, Plant and Equipment [Line Items]
Useful life	5 years
Trailers [Member]
Property, Plant and Equipment [Line Items]
Useful life	7 years
Service and Other Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	3 years
Service and Other Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	15 years
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	20 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	40 years