Note 4 - Prepaid Expenses and Other Current Assets (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Text Block Supplement [Abstract]

Schedule of Other Current Assets [Table Text Block]

	(in thousands)
	Year Ended December 31,
	2013		2012
Prepaid tires	$	10,607	$	9,174
Prepaid licenses, permits and tolls		1,915		1,951
Prepaid insurance		1,414		1,649
Other		2,128		2,641
Total prepaid expenses and other current assets	$	16,064	$	15,415