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Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2024
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Year ended December 31, |
(in thousands) |  | 2024 |  |  | 2023 |  |  | 2022 |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Expedited |  | $ | 416,461 |  |  | $ | 423,820 |  |  | $ | 452,713 |
Dedicated |  |  | 364,414 |  |  |  | 320,287 |  |  |  | 362,997 |
Managed Freight |  |  | 248,939 |  |  |  | 258,903 |  |  |  | 320,985 |
Warehousing |  |  | 101,662 |  |  |  | 100,563 |  |  |  | 80,163 |
Total revenues |  | $ | 1,131,476 |  |  | $ | 1,103,573 |  |  | $ | 1,216,858 |
Accounts Receivable, Allowance for Credit Loss [Table Text Block] |
Years ended December 31: |  | Beginning balance January 1, |  |  | (Reversal of) additional provisions to allowance |  |  | Write-offs and other adjustments |  |  | Ending balance December 31, |
2024 |  | $ | 2,449 |  |  | $ | (23 | ) |  | $ | (66 | ) |  | $ | 2,360 |
2023 |  | $ | 2,934 |  |  | $ | (258 | ) |  | $ | (227 | ) |  | $ | 2,449 |
2022 |  | $ | 4,112 |  |  | $ | 367 |  |  | $ | (1,545 | ) |  | $ | 2,934 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
(in thousands except per share data) |  |  |  |  |  |  |  |  |  |  |  |
|  | 2024 |  |  | 2023 |  |  | 2022 |
Numerators: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 35,321 |  |  | $ | 54,629 |  |  | $ | 107,932 |
Income from discontinued operations, net of tax |  |  | 600 |  |  |  | 600 |  |  |  | 750 |
Net income |  | $ | 35,921 |  |  | $ | 55,229 |  |  | $ | 108,682 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Denominator for basic income per share – weighted-average shares |  |  | 26,307 |  |  |  | 26,096 |  |  |  | 30,012 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Equivalent shares issuable upon conversion of unvested restricted shares |  |  | 161 |  |  |  | 489 |  |  |  | 715 |
Equivalent shares issuable upon conversion of unvested employee stock options |  |  | 1,246 |  |  |  | 1,083 |  |  |  | 321 |
Denominator for diluted income per share adjusted weighted-average shares and assumed conversions |  |  | 27,714 |  |  |  | 27,668 |  |  |  | 31,048 |
Basic income per share: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 1.35 |  |  | $ | 2.09 |  |  | $ | 3.60 |
Income from discontinued operations |  | $ | 0.02 |  |  | $ | 0.02 |  |  | $ | 0.02 |
Net income per basic share(1) |  | $ | 1.37 |  |  | $ | 2.12 |  |  | $ | 3.62 |
Diluted income per share: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 1.28 |  |  | $ | 1.97 |  |  | $ | 3.48 |
Income from discontinued operations |  | $ | 0.02 |  |  | $ | 0.02 |  |  | $ | 0.02 |
Net income per diluted share |  | $ | 1.30 |  |  | $ | 2.00 |  |  | $ | 3.50 |

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