Document And Entity Information
3 Months Ended
Apr. 04, 2015
May 07, 2015
Document and Entity Information [Abstract]    
Entity Registrant Name BUILD A BEAR WORKSHOP INC  
Document Type 10-Q  
Current Fiscal Year End Date --01-03  
Entity Common Stock, Shares Outstanding   17,199,310
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 Apr. 04, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q1