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v3.21.1

Delivery Costs (Details) - USD ($) | 3 Months Ended
--- | ---
Apr. 30, 2021 | Apr. 30, 2020
Other Income and Expenses [Abstract] |  |
Shipping and classroom delivery costs | $ 2,921,000 | $ 2,078,000

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Shipping And Classroom Delivery Costs + References No definition available. + Details
Name: | virc_ShippingAndClassroomDeliveryCosts
Namespace Prefix: | virc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration