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Warranty (Details Textual)	6 Months Ended
	Jul. 31, 2012
Warranty (Textual) [Abstract]
Product warranty	10 years

X

- Definition

Product warranty.

+ References

No definition available.

+ Details

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

X

- Details

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