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Note 4 - Discontinued Operations (Details Textual) - Transport Financial Services [Member] - Discontinued Operations, Disposed of by Sale [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Jul. 08, 2020
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net |  |  |  |  | $ 103,300
Disposal Group Including Discontinued Operation Accounts Notes And Loans Receivable Gross |  |  |  |  | 108,700
Disposal Group, Including Discontinued Operation, Allowance |  |  |  |  | $ 5,400
Cash Provided by (Used in) Operating Activities, Discontinued Operations | $ 0 | $ 0 | $ 0 | $ 0 |

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- Definition Represents the disposal group, including discontinued operation accounts notes and loans receivable, gross. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of allowance on accounts receivable, attributable to disposal group held for sale or disposed of, classified as current. + References No definition available. + Details
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Namespace Prefix: | cvlg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of cash inflow (outflow) of operating activities of discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3521-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760 + Details
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- Definition Amount classified as accounts, notes and loans receivable attributable to disposal group held for sale or disposed of. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=109222160&loc=d3e1107-107759 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 11 -URI https://asc.fasb.org/extlink&oid=109222160&loc=SL51721533-107759 + Details
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- Details
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Data Type: | na
Balance Type: |
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- Details
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Balance Type: |
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