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Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Year ended December 31, |
(in thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Expedited |  | $ | 320,202 |  |  | $ | 356,521 |  |  | $ | 469,308 |
Dedicated |  |  | 288,652 |  |  |  | 342,473 |  |  |  | 257,739 |
Managed Freight |  |  | 177,579 |  |  |  | 138,616 |  |  |  | 129,790 |
Warehousing |  |  | 52,128 |  |  |  | 47,777 |  |  |  | 23,580 |
Total revenues |  | $ | 838,561 |  |  | $ | 885,387 |  |  | $ | 880,417 |
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, |
2020 |  | $ | 1,440 |  |  | $ | 3,011 |  |  | $ | (1,459 | ) |  | $ | 2,992 |
2019 |  | $ | 1,577 |  |  | $ | 141 |  |  | $ | (278 | ) |  | $ | 1,440 |
2018 |  | $ | 1,258 |  |  | $ | 182 |  |  | $ | 137 |  |  | $ | 1,577 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
(in thousands except per share data) |  |  |  |  |  |  |  |  |  |  |  |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Numerators: |  |  |  |  |  |  |  |  |  |  |  |
(Loss) income from continuing operations |  | $ | (14,120 | ) |  | $ | 5,219 |  |  | $ | 40,860 |
(Loss) income from discontinued operations |  |  | (28,598 | ) |  |  | 3,258 |  |  |  | 1,643 |
Net (loss) income |  | $ | (42,718 | ) |  | $ | 8,477 |  |  | $ | 42,503 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Denominator for basic income per share – weighted-average shares |  |  | 17,358 |  |  |  | 18,435 |  |  |  | 18,340 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Equivalent shares issuable upon conversion of unvested restricted shares |  |  | - |  |  |  | 200 |  |  |  | 129 |
Equivalent shares issuable upon conversion of unvested employee stock options |  |  | - |  |  |  | - |  |  |  | - |
Denominator for diluted income per share adjusted weighted-average shares and assumed conversions |  |  | 17,358 |  |  |  | 18,635 |  |  |  | 18,469 |
Basic (loss) income per share: |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations |  | $ | (0.81 | ) |  | $ | 0.28 |  |  | $ | 2.23 |
(Loss) income from discontinued operations |  | $ | (1.65 | ) |  | $ | 0.18 |  |  | $ | 0.09 |
Net (loss) income per basic share |  | $ | (2.46 | ) |  | $ | 0.46 |  |  | $ | 2.32 |
Diluted (loss) income per share: |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations |  | $ | (0.81 | ) |  | $ | 0.28 |  |  | $ | 2.21 |
(Loss) income from discontinued operations |  | $ | (1.65 | ) |  | $ | 0.17 |  |  | $ | 0.09 |
Diluted income per share |  | $ | (2.46 | ) |  | $ | 0.45 |  |  | $ | 2.30 |

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