Note 2 - Details of Consolidated Balance Sheet Accounts - Prepaid Expenses and Other (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Insurance premiums	$ 4,054	$ 3,749
Contract assets	2,746	2,243
Other	3,734	3,504
Prepaid Expense and Other Assets, Current	27,320	23,980
License Fees Member [Member]
Prepaid expenses	6,029	5,485
Parts And Tires Inventory [Member]
Prepaid expenses	5,427	4,375
Tires In Service [Member]
Prepaid expenses	$ 5,330	$ 4,624