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Commitments (Lease Terms) (Details) | 12 Months Ended
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Jan. 31, 2017
Manufacturing and Distribution Facility in Torrance, CA [Member] |
Property Subject to or Available for Operating Lease [Line Items] |
Operating lease period | 5 years
Manufacturing Facility in Conway, AR [Member] |
Property Subject to or Available for Operating Lease [Line Items] |
Operating lease period | 10 years

X
- Definition Term of the lessor's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LessorLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- 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
Name: | us-gaap_PropertySubjectToOrAvailableForOperatingLeaseLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_MajorPropertyClassAxis=virc_ManufacturingAndDistributionFacilityInTorranceCaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorPropertyClassAxis=virc_ManufacturingFacilityInConwayArMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |