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Note 6 - Acquisition of Sims Transport Services, LLC - Allocation of Preliminary Purchase Price (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 18, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Cash paid pursuant to Stock Purchase Agreement   $ 4,556 $ 107,934 $ 38,501
Sims Transport Services, LLC [Member]        
Cash paid pursuant to Stock Purchase Agreement $ 8,573      
Cash acquired included in historical book value of Sims' assets and liabilities (526)      
Contingent consideration, Acquisition 1,786      
Net purchase price $ 9,833