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Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Year ended December 31, |
(in thousands) |  | 2021 |  |  | 2020 |
Revenues: |  |  |  |  |  |  |  |
Expedited |  | $ | 337,063 |  |  | $ | 320,202 |
Dedicated |  |  | 324,541 |  |  |  | 288,652 |
Managed Freight |  |  | 321,236 |  |  |  | 177,579 |
Warehousing |  |  | 63,163 |  |  |  | 52,128 |
Total revenues |  | $ | 1,046,003 |  |  | $ | 838,561 |
Accounts Receivable, Allowance for Credit Loss [Table Text Block] |
Years ended December 31: |  | Beginning balance January 1, |  |  | Additional provisions to allowance |  |  | Write-offs and other adjustments |  |  | Ending balance December 31, |
2021 |  | $ | 2,992 |  |  | $ | 1,338 |  |  | $ | (218 | ) |  | $ | 4,112 |
2020 |  | $ | 1,440 |  |  | $ | 3,011 |  |  | $ | (1,459 | ) |  | $ | 2,992 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
(in thousands except per share data) |  |  |  |  |  |  |  |
|  | 2021 |  |  | 2020 |
Numerators: |  |  |  |  |  |  |  |
Income (loss) from continuing operations |  | $ | 58,191 |  |  | $ | (14,120 | )
Income (loss) from discontinued operations, net of tax |  |  | 2,540 |  |  |  | (28,598 | )
Net income (loss) |  | $ | 60,731 |  |  | $ | (42,718 | )
Denominator: |  |  |  |  |  |  |  |
Denominator for basic income per share – weighted-average shares |  |  | 16,803 |  |  |  | 17,358 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Equivalent shares issuable upon conversion of unvested restricted shares |  |  | 217 |  |  |  | - |
Equivalent shares issuable upon conversion of unvested employee stock options |  |  | - |  |  |  | - |
Denominator for diluted income per share adjusted weighted-average shares and assumed conversions |  |  | 17,020 |  |  |  | 17,358 |
Basic income (loss) per share: |  |  |  |  |  |  |  |
Income (loss) from continuing operations |  | $ | 3.46 |  |  | $ | (0.81 | )
Income (loss) from discontinued operations |  | $ | 0.15 |  |  | $ | (1.65 | )
Net income (loss) |  | $ | 3.61 |  |  | $ | (2.46 | )
Diluted income (loss) per share: |  |  |  |  |  |  |  |
Income (loss) from continuing operations |  | $ | 3.42 |  |  | $ | (0.81 | )
Income (loss) from discontinued operations |  | $ | 0.15 |  |  | $ | (1.65 | )
Net income (loss) |  | $ | 3.57 |  |  | $ | (2.46 | )

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