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Leases and Commitments (Lease Terms) (Details) | Jan. 31, 2020
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Commitments [Abstract] |
Lease length | 5 years

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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Definition Commitments [Abstract] + References No definition available. + Details
Name: | virc_CommitmentsAbstract
Namespace Prefix: | virc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration