Note 2 - Details of Consolidated Balance Sheet Accounts (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Text Block Supplement [Abstract]

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]

(In thousands)	2014		2013
Tires in service	$	4,438	$	3,982
License fees		4,397		4,169
Parts and tires inventory		3,754		3,133
Insurance premiums		1,537		1,384
Other		2,734		2,606
	$	16,860	$	15,274

Schedule of Accrued Liabilities [Table Text Block]

(In thousands)	2014		2013
Accrued expenses	$	5,536	$	6,406
Vacation		4,301		3,872
Salaries and wages		1,204		1,415
Accrued liability to MWL		466		3,892
Current income taxes		301		3,106
Other		902		560
	$	12,710	$	19,251