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Employee Retention Credit (Details Narrative) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Employee Retention Credit |  |
Employee retention credit eligible amount | $ (1,529) | $ 1,529
Employee retention credit receivable noncurrent |  | 1,529
Employee retention credits |  | $ 1,529

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- References No definition available. + Details
Name: | CVV_DisclosureEmployeeRetentionCreditAbstract
Namespace Prefix: | CVV_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Employee retention credit receivable noncurrent. + References No definition available. + Details
Name: | CVV_EmployeeRetentionCreditReceivableNoncurrent
Namespace Prefix: | CVV_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Employee retention tax credits income. + References No definition available. + Details
Name: | CVV_EmployeeRetentionTaxCreditsIncome
Namespace Prefix: | CVV_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Increase decrease in employee retention credit receivable. + References No definition available. + Details
Name: | CVV_IncreaseDecreaseInEmployeeRetentionCreditReceivable
Namespace Prefix: | CVV_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration