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Employee Retention Credit (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
	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.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Employee retention credit receivable noncurrent.

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No definition available.

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Namespace Prefix:	CVV_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

Employee retention tax credits income.

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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.

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No definition available.

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Name:	CVV_IncreaseDecreaseInEmployeeRetentionCreditReceivable
Namespace Prefix:	CVV_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration