Summary of Business and Significant Accounting Policies (Effects of COVID-19 Pandemic) (Details) - USD ($) $ in Millions	12 Months Ended
Jan. 31, 2022	Jan. 31, 2021
Accounting Policies [Abstract]
Percentage increase (decrease) in order rates from prior year due to COVID	40.00%	20.00%
Additional compensation expense, COVID-related	$ 2

Percentage Increase (Decrease) In Order Rates From Prior Year, Covid Related

No definition available.

Name:	virc_PercentageIncreaseDecreaseInOrderRatesFromPriorYearCovidRelated
Namespace Prefix:	virc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration