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Segment Information - Additional Information (Detail) | 9 Months Ended
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Sep. 30, 2014 Entity
Segment Reporting [Abstract] |
Number of entities comprising operating segment | 6

X
- Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of entities comprising operating segment. + References No definition available. + Details
Name: | vicr_NumberOfEntitiesComprisingOperatingSegment
Namespace Prefix: | vicr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration