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Document and Entity Information
 9 Months Ended
Sep. 30, 2013
Document Information [Line Items]  
Document Type 10-Q
Amendment Flag false
Document Period End Date Sep. 30, 2013
Document Fiscal Year Focus 2013
Document Fiscal Period Focus Q3
Entity Registrant Name VICOR CORP
Entity Central Index Key 0000751978
Current Fiscal Year End Date --12-31
Entity Filer Category Accelerated Filer
Entity Common Stock, Shares Outstanding 26,771,119
Class B Common Stock [Member]
  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 11,767,052