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Note 3 - Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Thousands |  |  |  | 3 Months Ended
--- | --- | --- | --- | ---
Aug. 18, 2023 | Apr. 26, 2023 | Feb. 09, 2022 | Mar. 31, 2025 | Mar. 31, 2024
Payment for Contingent Consideration Liability, Financing Activities |  |  |  | $ 4,530 | $ 7,023
AAT Carriers Inc [Member] |  |  |  |  |
Business Combination, Contingent Consideration, Earnout Period (Year) |  |  | 2 years |  |
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) |  |  |  | 12,500 | 10,000
Payment for Contingent Consideration Liability, Financing Activities |  |  |  | 4,500 | 7,000
Payment for Contingent Consideration Liability, Operating Activities |  |  |  | 8,000 | 3,000
AAT Carriers Inc [Member] | Stock Purchase Agreement, Earnout Component [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  | $ 20,000 |  |
Lew Thompson & Son Trucking, Inc. [Member] |  |  |  |  |
Business Combination, Contingent Consideration, Earnout Period (Year) |  | 3 years |  |  |
Lew Thompson & Son Trucking, Inc. [Member] | Changes Measurement [Member] |  |  |  |  |
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) |  |  |  | 700 | $ 8,100
Lew Thompson & Son Trucking, Inc. [Member] | Stock Purchase Agreement, Earnout Component [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High |  | $ 30,000 |  |  |
Sims Transport Services, LLC [Member] |  |  |  |  |
Business Combination, Contingent Consideration, Earnout Period (Year) | 4 years |  |  |  |
Sims Transport Services, LLC [Member] | Greg's Earnout [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High |  |  |  | $ 5,000 |
Sims Transport Services, LLC [Member] | Stock Purchase Agreement, Earnout Component [Member] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High | $ 12,000 |  |  |  |

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