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Debt (Long-term Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2015
Jan. 31, 2015
Apr. 30, 2014
Debt Instrument [Line Items]      
Long-term debt $ 20,844us-gaap_LongTermDebt $ 9,519us-gaap_LongTermDebt $ 20,586us-gaap_LongTermDebt
Less current portion 14,691us-gaap_LongTermDebtCurrent 3,366us-gaap_LongTermDebtCurrent 14,586us-gaap_LongTermDebtCurrent
Non-current portion 6,153us-gaap_LongTermDebtNoncurrent 6,153us-gaap_LongTermDebtNoncurrent 6,000us-gaap_LongTermDebtNoncurrent
Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Long-term debt 20,691us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
9,366us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
20,586us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
Other Debt [Member]      
Debt Instrument [Line Items]      
Long-term debt $ 153us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= virc_OtherDebtMember
$ 153us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= virc_OtherDebtMember
$ 0us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= virc_OtherDebtMember