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Note 3 - Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Millions	Jun. 30, 2022	Feb. 09, 2022
AAT Carriers Inc [Member]
Stock Purchase Agreement, Earnout Component	$ 20.0	$ 20.0
Fair Value, Recurring [Member] | Interest Rate Swap [Member]
Derivative Assets (Liabilities), at Fair Value, Net, Total	$ 0.5

X

- Definition

The earnout component of stock purchase agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	cvlg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126966630&loc=d3e41228-113958

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Details

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Namespace Prefix:
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X

- Details

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X

- Details

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