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

12 Months Ended

Dec. 31, 2022

Notes Tables

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

(In thousands)	2022		2021
License fees	$	6,029	$	5,485
Parts and tires inventory		5,427		4,375
Tires in service		5,330		4,624
Insurance premiums		4,054		3,749
Contract assets		2,746		2,243
Other		3,734		3,504
	$	27,320	$	23,980

Schedule of Accrued Liabilities [Table Text Block]

(In thousands)	2022		2021
Salaries and wages	$	14,750	$	11,690
Accrued expenses		14,426		8,606
Vacation		9,776		8,572
Other		2,312		2,527
	$	41,264	$	31,395