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Note 2 - Details of Consolidated Balance Sheet Accounts - Prepaid Expenses and Other (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Insurance premiums | $ 3,653 | $ 2,356
Contract assets | 1,545 | 1,729
Other | 3,103 | 3,166
Prepaid Expense and Other Assets, Current | 21,903 | 20,938
License Fees Member [Member] |  |
Prepaid expenses | 5,529 | 5,321
Tires In Service [Member] |  |
Prepaid expenses | 4,701 | 4,972
Parts And Tires Inventory [Member] |  |
Prepaid expenses | $ 3,372 | $ 3,394

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