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Stock-Based Compensation and Stockholders' Rights (Restricted Stock Units) (Details) (USD $) | 12 Months Ended
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Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013
Weighted- average fair value of restricted stock units |  |  |
Aggregate fair value of stock awards vested during the period | $ 553,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue | $ 523,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue | $ 744,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Restricted Stock or Stock Units [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 518,626 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 99,430 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 669,375 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Expense for 12 months ended | 502,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 523,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 698,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Unrecognized compensation at cost | 1,499,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |
Restricted Stock Units |  |  |
Beginning balance | 544,430 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 743,375 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 290,960 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Granted | 518,626 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 99,430 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 669,375 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Vested | (232,430)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | (260,375)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | (204,960)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Forfeited | (18,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | (38,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | (12,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Ending balance | 812,626 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 544,430 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 743,375 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Weighted- average fair value of restricted stock units |  |  |
Beginning balance | $ 1.87 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | $ 1.89 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | $ 3.80 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Granted | $ 2.61 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | $ 2.07 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | $ 1.62 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Vested | $ 2.38 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | $ 2.01 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | $ 3.63 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Forfeited | $ 2.61 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | $ 2.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | $ 3.50 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Ending balance | $ 1.87 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | $ 1.87 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | $ 1.89 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
2011 Plan [Member] | Restricted Stock or Stock Units [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 518,626 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 518,626 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
2011 Plan [Member] | Restricted Stock Issued on Six Twenty Four Two Thousand Fourteen Vesting Over One Year [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 28,626 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedonSixTwentyFourTwoThousandFourteenVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Maximum term of stock options | 1 year |  |
Expense for 12 months ended | 49,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedonSixTwentyFourTwoThousandFourteenVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedonSixTwentyFourTwoThousandFourteenVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedonSixTwentyFourTwoThousandFourteenVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember
Unrecognized compensation at cost | 25,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedonSixTwentyFourTwoThousandFourteenVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 28,626 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedonSixTwentyFourTwoThousandFourteenVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
2011 Plan [Member] | Restricted Stock Issued On Two Thousand fourteen Vesting Over Five Year [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 490,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandfourteenVestingOverFiveYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Maximum term of stock options | 5 years |  |
Expense for 12 months ended | 171,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandfourteenVestingOverFiveYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandfourteenVestingOverFiveYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandfourteenVestingOverFiveYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember
Unrecognized compensation at cost | 1,108,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandfourteenVestingOverFiveYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 490,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandfourteenVestingOverFiveYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
2011 Plan [Member] | RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverFiveYears [Domain] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 18,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverOneYearsDomain / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Maximum term of stock options | 5 years |  |
Expense for 12 months ended | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverOneYearsDomain / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 1,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverOneYearsDomain / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverOneYearsDomain / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember
Unrecognized compensation at cost | 0 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverOneYearsDomain / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 18,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverOneYearsDomain / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
2011 Plan [Member] | 10,000 units of restricted stock issued on 12/3/2013 vesting over 1 year [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 10,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Maximum term of stock options | 1 year |  |
Expense for 12 months ended | 13,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 6,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember
Unrecognized compensation at cost | 0 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 10,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandThirteenTwelveThreeVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
2011 Plan [Member] | Restricted Stock Issued on Two Thousand Thirteen Six Twenty Five Vesting Over One Year [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 71,430 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedonTwoThousandThirteenSixTwentyFiveVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Maximum term of stock options | 1 year |  |
Expense for 12 months ended | 50,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedonTwoThousandThirteenSixTwentyFiveVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 100,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedonTwoThousandThirteenSixTwentyFiveVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedonTwoThousandThirteenSixTwentyFiveVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember
Unrecognized compensation at cost | 0 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedonTwoThousandThirteenSixTwentyFiveVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 71,430 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedonTwoThousandThirteenSixTwentyFiveVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
2011 Plan [Member] | Restricted Stock Units Issued On Two Thousand Twelve Six Nineteen Vesting Over One Year [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 31,250 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockUnitsIssuedOnTwoThousandTwelveSixNineteenVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Maximum term of stock options | 1 year |  |
Expense for 12 months ended | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockUnitsIssuedOnTwoThousandTwelveSixNineteenVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 17,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockUnitsIssuedOnTwoThousandTwelveSixNineteenVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 33,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockUnitsIssuedOnTwoThousandTwelveSixNineteenVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember
Unrecognized compensation at cost | 0 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = virc_RestrictedStockUnitsIssuedOnTwoThousandTwelveSixNineteenVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 31,250 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockUnitsIssuedOnTwoThousandTwelveSixNineteenVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
2011 Plan [Member] | Restricted Stock Issued On Two Thousand Twelve Six Nineteen Vesting Over Five Years [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 520,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandTwelveSixNineteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Maximum term of stock options | 5 years |  |
Expense for 12 months ended | 157,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandTwelveSixNineteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 160,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandTwelveSixNineteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember | 111,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandTwelveSixNineteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember
Unrecognized compensation at cost | 366,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandTwelveSixNineteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 520,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandTwelveSixNineteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandElevenStockIncentivePlanMember |  |
2007 Plan [Member] | Grants of Restricted Stock, issued 6/19/2012, vesting over 1 year [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 78,125 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedSixNineteenTwoThousandTwelveVestingOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
Maximum term of stock options | 1 year |  |
Expense for 12 months ended | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedSixNineteenTwoThousandTwelveVestingOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember | 41,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedSixNineteenTwoThousandTwelveVestingOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember | 82,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedSixNineteenTwoThousandTwelveVestingOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember
Unrecognized compensation at cost | 0 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedSixNineteenTwoThousandTwelveVestingOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 78,125 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedSixNineteenTwoThousandTwelveVestingOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
2007 Plan [Member] | 40,000 Grants of Restricted Stock, issued 3/21/2012, vesting immediately [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 40,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedThreeTwentyOneTwoThousandAndTwelveVestingImmediatelyMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
Expense for 12 months ended | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedThreeTwentyOneTwoThousandAndTwelveVestingImmediatelyMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedThreeTwentyOneTwoThousandAndTwelveVestingImmediatelyMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember | 80,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedThreeTwentyOneTwoThousandAndTwelveVestingImmediatelyMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember
Unrecognized compensation at cost | 0 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedThreeTwentyOneTwoThousandAndTwelveVestingImmediatelyMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 40,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedThreeTwentyOneTwoThousandAndTwelveVestingImmediatelyMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
2007 Plan [Member] | 68,960 Grants of Restricted Stock, issued 6/21/2011, vesting over 1 year [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 68,960 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandElevenSixTwentyOneVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
Maximum term of stock options | 1 year |  |
Expense for 12 months ended | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandElevenSixTwentyOneVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandElevenSixTwentyOneVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember | 67,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandElevenSixTwentyOneVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember
Unrecognized compensation at cost | 0 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandElevenSixTwentyOneVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 68,960 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandElevenSixTwentyOneVestingOverOneYearMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
2007 Plan [Member] | 382,500 Restricted Stock Units, issued 6/16/2009, vesting over 5 years [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 382,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandNineSixSixteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
Maximum term of stock options | 5 years |  |
Expense for 12 months ended | 62,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandNineSixSixteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember | 198,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandNineSixSixteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember | 226,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandNineSixSixteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember
Unrecognized compensation at cost | 0 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandNineSixSixteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 382,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockIssuedOnTwoThousandNineSixSixteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
2007 Plan [Member] | 262,500 Restricted Stock Units, issued 6/19/2007, vesting over 5 years [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 262,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockUnitsIssuedOnTwoThousandSevenSixNineteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
Maximum term of stock options | 5 years |  |
Expense for 12 months ended | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockUnitsIssuedOnTwoThousandSevenSixNineteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockUnitsIssuedOnTwoThousandSevenSixNineteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember | 99,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = virc_RestrictedStockUnitsIssuedOnTwoThousandSevenSixNineteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember
Unrecognized compensation at cost | $ 0 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = virc_RestrictedStockUnitsIssuedOnTwoThousandSevenSixNineteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |
Restricted Stock Units |  |  |
Granted | 262,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = virc_RestrictedStockUnitsIssuedOnTwoThousandSevenSixNineteenVestingOverFiveYearsMember / us-gaap_PlanNameAxis = virc_TwoThousandSevenStockIncentivePlanMember |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References No definition available. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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