v2.4.0.6
Document and Entity Information
9 Months Ended
Sep. 28, 2013
Oct. 29, 2013
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 28, 2013  
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q3  
Trading Symbol IVAC  
Entity Registrant Name INTEVAC INC  
Entity Central Index Key 0001001902  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   24,006,002