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Note 13 - Subsequent Events (Details Textual) - Subsequent Event [Member] - TBK Bank [Member] $ in Millions	Jul. 17, 2025 USD ($)
Proceeds From Reimbursement	$ 3.8
Indemnification Payments, Settlement	$ 37.3

X

- Definition

The value of indemnification payments from a settlement.

+ References

No definition available.

+ Details

Name:	cvti_IndemnificationPaymentsSettlement
Namespace Prefix:	cvti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	cvti_ProceedsFromReimbursement
Namespace Prefix:	cvti_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=cvti_TBKBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: