v3.8.0.1
Document And Entity Information - shares
3 Months Ended
May 05, 2018
Jun. 07, 2018
Document Information [Line Items]    
Entity Registrant Name BUILD A BEAR WORKSHOP INC  
Entity Central Index Key 0001113809  
Trading Symbol bbw  
Current Fiscal Year End Date --02-02  
Entity Filer Category Accelerated Filer  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Well-known Seasoned Issuer No  
Entity Common Stock, Shares Outstanding (in shares)   15,022,680
Document Type 10-Q  
Document Period End Date May 05, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q1  
Amendment Flag false