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v3.19.3

Product Warranties - Additional Information (Detail) |  | 9 Months Ended
--- | --- | ---
Jan. 01, 2017 | Sep. 30, 2019
Product Warranty Liability [Line Items] |  |
Product warranty period |  | 2 years
Military Grade Products [Member] |  |
Product Warranty Liability [Line Items] |  |
Extended warranty period | 3 years |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ProductWarrantyLiabilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Extended Warranty Period. + References No definition available. + Details
Name: | vicr_ExtendedWarrantyPeriod
Namespace Prefix: | vicr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Product warranty periods. + References No definition available. + Details
Name: | vicr_ProductWarrantyPeriods
Namespace Prefix: | vicr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_ProductOrServiceAxis=vicr_MilitaryGradeProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |