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Income Taxes - Additional Information (Detail) | Jun. 30, 2020 USD ($)
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Income Tax Disclosure [Line Items] |
Valuation allowance, deferred tax assets | $ 30,363,000

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Income Tax Disclosure [Line Items] + References No definition available. + Details
Name: | vicr_IncomeTaxDisclosureLineItems
Namespace Prefix: | vicr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration