Note 13 - Segment Information (Details Textual)	12 Months Ended
Dec. 31, 2019
Number of Asset-based Operating Fleets Aggregated in a Segment	4

The number of asset-based operating fleets that are aggregated in a segment because they have similar economic characteristics and meet the aggregation criteria.

No definition available.

Name:	cvti_NumberOfAssetbasedOperatingFleetsAggregatedInASegment
Namespace Prefix:	cvti_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration