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Note 10 - Equity Method Investment - TEL's Summarized Financial Information (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Operating lease obligations	$ 10,796	$ 10,349
Transport Enterprise Leasing LLC [Member]
Operating lease obligations	8,951	10,092
Transport Enterprise Leasing LLC [Member] | Driver Advances and Other Receivable [Member]
Accounts receivable from TEL	12	0
Transport Enterprise Leasing LLC [Member] | Accrued Expenses [Member]
Accounts payable to TEL	551	275
Transport Enterprise Leasing LLC [Member] | Other Assets [Member]
Investment in TEL	$ 83,980	$ 77,405

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