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New Accounting Pronouncements (Narrative) (Details) $ in Thousands	12 Months Ended
	Jan. 31, 2021 USD ($)
COVID-19
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reduction In Variable Lease Expense	$ 136

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

Reduction In Variable Lease Expense

+ References

No definition available.

+ Details

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Namespace Prefix:	virc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: