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Other Investments - Additional Information (Detail) (USD $) | 12 Months Ended
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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 | 2 vicr_NumberOfAgreement |  |
Purchase of components under agreement | $ 2,146,000 us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityPurchases | $ 1,959,000 us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityPurchases | $ 2,087,000 us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityPurchases
GWS [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Company owed GWS | 170,000 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember | 152,000 us-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 | 0 us-gaap_EquityMethodInvestments / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember | 0 us-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 | $ 5,000,000 us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_StatementClassOfStockAxis = us-gaap_ConvertiblePreferredStockMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember | $ 5,000,000 us-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 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Subparagraph 1 -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.17) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 17 -Article 7 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(3),(4)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 3, 4 -Article 9 + Details
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