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Warranty Accrual (Details Textual)	3 Months Ended
	Apr. 30, 2013
Warranty (Textual) [Abstract]
Product Warranty	10 years

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- Definition

Product warranty.

+ References

No definition available.

+ Details

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Namespace Prefix:	virc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	virc_WarrantyTextualAbstract
Namespace Prefix:	virc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration