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Other Investments - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 Agreement	Dec. 31, 2013	Dec. 31, 2012
Variable Interest Entity [Line Items]
Ownership interest in investment	27.00%us-gaap_EquityMethodInvestmentOwnershipPercentage	27.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
Number of supply agreements with GWS	2vicr_NumberOfAgreement
Purchase of components under agreement	$ 2,146,000us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityPurchases	$ 1,959,000us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityPurchases	$ 2,087,000us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityPurchases
GWS [Member]
Variable Interest Entity [Line Items]
Company owed GWS	170,000us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember	152,000us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember
Great Wall Semiconductor Corporation (GWS) [Member]
Variable Interest Entity [Line Items]
Investment in non-voting convertible preferred stock	0us-gaap_EquityMethodInvestments / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember	0us-gaap_EquityMethodInvestments / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Great Wall Semiconductor Corporation (GWS) [Member] | Convertible Preferred Stock [Member]
Variable Interest Entity [Line Items]
Gross investment in non-voting convertible preferred stock	$ 5,000,000us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_StatementClassOfStockAxis = us-gaap_ConvertiblePreferredStockMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember	$ 5,000,000us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_StatementClassOfStockAxis = us-gaap_ConvertiblePreferredStockMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember

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- Definition

Carrying amount as of the balance sheet date of obligations due all related parties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

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- Definition

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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No definition available.

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