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Note 3 - Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Thousands			3 Months Ended	6 Months Ended
	Apr. 26, 2023	Feb. 09, 2022	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2022
Payment for Contingent Consideration Liability, Financing Activities				$ 9,187	$ (0)
AAT Carriers Inc [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		$ 20,000
Business Combination, Contingent Consideration, Earnout Period (Year)		2 years
Payment for Contingent Consideration Liability			$ 0	10,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			10,500	1,500
Payment for Contingent Consideration Liability, Financing Activities				9,200
Payment for Contingent Consideration Liability, Operating Activities				$ 800
AAT Carriers Inc [Member] | Changes Measurement [Member]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			500
AAT Carriers Inc [Member] | Stock Purchase Agreement, Earnout Component [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		$ 20,000
Lew Thompson & Son Trucking, Inc. [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 30,000
Business Combination, Contingent Consideration, Earnout Period (Year)	3 years
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			$ 10,000
Lew Thompson & Son Trucking, Inc. [Member] | Stock Purchase Agreement, Earnout Component [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 129,900
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High	$ 30,000

X

- Definition

Period for earnout of contingent consideration in a business combination.

+ References

No definition available.

+ Details

Name:	cvti_BusinessCombinationContingentConsiderationEarnoutPeriod
Namespace Prefix:	cvti_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of cash outflow for payment for contingent consideration liability.

+ References

No definition available.

+ Details

Name:	cvti_PaymentForContingentConsiderationLiability
Namespace Prefix:	cvti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479581/805-30-50-4

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

This element represents the amount of any change recognized during the period in the high-end of the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479581/805-30-50-4

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479581/805-30-50-1

+ Details

Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of cash outflow, not made soon after acquisition date of business combination, to settle contingent consideration liability up to amount recognized at acquisition date, including, but not limited to, measurement period adjustment and less amount paid soon after acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-Subparagraph (f)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-15

+ Details

Name:	us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of cash outflow, not made soon after acquisition date of business combination, to settle contingent consideration liability exceeding amount recognized at acquisition date. Includes, but is not limited to, measurement period adjustment and less amount paid soon after acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 17
-Subparagraph (ee)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-17

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=cvti_AATCarriersIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_ChangeDuringPeriodFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=cvti_StockPurchaseAgreementEarnoutComponentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=cvti_LewThompsonSonTruckingIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: