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

12 Months Ended

Dec. 31, 2016

Notes Tables

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

(In thousands)	20 16		2015
Tires in service	$	5,351	$	5,064
License fees		5,042		4,921
Parts and tires inventory		4,350		4,011
Insurance premiums		1,658		1,730
Other		2,906		2,408
	$	19,307	$	18,134

Schedule of Accrued Liabilities [Table Text Block]

(In thousands)	201 6		2015
Accrued expenses	$	12,903	$	7,940
Vacation		5,353		4,782
Accrued liability to MWL		3,026		4,284
Salaries and wages		1,839		2,644
Other		3,718		1,984
	$	26,839	$	21,634