Document And Entity Information (USD $)
12 Months Ended
Dec. 28, 2013
Mar. 07, 2014
Jun. 29, 2013
Document and Entity Information [Abstract]      
Entity Registrant Name BUILD A BEAR WORKSHOP INC    
Document Type 10-K    
Current Fiscal Year End Date --12-28    
Entity Common Stock, Shares Outstanding   17,400,528  
Entity Public Float     $ 72,341,234
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 No    
Document Period End Date Dec. 28, 2013    
Document Fiscal Year Focus 2013    
Document Fiscal Period Focus FY