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v3.25.1

Note 1 - Significant Accounting Policies (Details Textual) | Mar. 31, 2025
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Tractors [Member] |
Property, Plant and Equipment, Useful Life (Year) | 5 years
Tractors [Member] | Minimum [Member] |
Property, Plant and Equipment, Salvage Value, Percentage | 0.00%
Tractors [Member] | Maximum [Member] |
Property, Plant and Equipment, Salvage Value, Percentage | 35.00%
Refrigerated Trailers [Member] |
Property, Plant and Equipment, Useful Life (Year) | 7 years
Dry Van Trailers [Member] |
Property, Plant and Equipment, Useful Life (Year) | 10 years
Dry Van Trailers [Member] | Minimum [Member] |
Property, Plant and Equipment, Salvage Value, Percentage | 20.00%
Dry Van Trailers [Member] | Maximum [Member] |
Property, Plant and Equipment, Salvage Value, Percentage | 25.00%

X
- Definition Stated as a percentage, the estimated or actual value of the asset at the end of its useful life or when it is no longer serviceable (cannot be used for its original purpose) divided by its [historical] capitalized cost. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentSalvageValuePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=cvti_TractorsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=cvti_RefrigeratedTrailersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=cvti_DryVanTrailersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |