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Note 10 - Equity Method Investment (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Proceeds from Sale of Property, Plant, and Equipment |  |  | $ 17,054 | $ 17,280 |  |
Income (Loss) from Equity Method Investments | $ 4,268 | $ 4,094 | 8,044 | $ 7,770 | $ 8,044 | $ 7,770
Transport Enterprise Leasing LLC [Member] | Revenue Equipment [Member] |  |  |  |  |  |
Note Payable Assumed From Sale of Equipment |  | 26,200 | $ 9,000 |  |  |
Proceeds from Sale of Property, Plant, and Equipment |  | $ 500 |  |  |  |
Transport Enterprise Leasing LLC [Member] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | 49.00% |  | 49.00% |  | 49.00% |
Income (Loss) from Equity Method Investments |  |  | $ 8,000 |  |  |

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