Note 4 - Segment Reporting (Details) - Base Revenue by Segment, Percentage	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Trucking [Member]
Three Months Ended
Revenues, percentage	71.80%	71.70%	73.60%	72.80%
SCS [Member]
Three Months Ended
Revenues, percentage	28.20%	28.30%	26.40%	27.20%