XML 69 R55.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Long-Term Investments - Amortized Cost and Estimated Fair Value of Available-for-Sale Securities by Contractual Maturities (Detail) $ in Thousands | Dec. 31, 2016 USD ($)
--- | ---
Available-for-sale Securities, Debt Maturities [Abstract] |
Due in twenty to forty years, Cost | $ 3,000
Due in twenty to forty years, Estimated Fair Value | $ 2,508

X
- References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Available for sale securities debt maturities year twenty through forty amortized cost basis. + References No definition available. + Details
Name: | vicr_AvailableForSaleSecuritiesDebtMaturitiesYearTwentyThroughFortyAmortizedCostBasis
Namespace Prefix: | vicr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Available for sale securities debt maturities year twenty through forty fair value. + References No definition available. + Details
Name: | vicr_AvailableForSaleSecuritiesDebtMaturitiesYearTwentyThroughFortyFairValue
Namespace Prefix: | vicr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant