Document And Entity Information
9 Months Ended
Oct. 01, 2011
Nov. 07, 2011
Document and Entity Information [Abstract]    
Entity Registrant Name BUILD A BEAR WORKSHOP INC  
Document Type 10-Q  
Current Fiscal Year End Date --01-01  
Entity Common Stock, Shares Outstanding   17,481,635
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 Oct. 01, 2011  
Document Fiscal Year Focus 2011  
Document Fiscal Period Focus Q3