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Document And Entity Information - shares
 6 Months Ended
Jul. 04, 2015
Aug. 07, 2015
Document and Entity Information [Abstract]    
Entity Registrant Name BUILD A BEAR WORKSHOP INC  
Document Type 10-Q  
Current Fiscal Year End Date --01-02  
Entity Common Stock, Shares Outstanding   16,941,315
Amendment Flag false  
Entity Central Index Key 0001113809  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Filer Category Accelerated Filer  
Entity Well-known Seasoned Issuer Yes  
Document Period End Date Jul. 04, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q2