v3.10.0.1
Document And Entity Information - shares
9 Months Ended
Nov. 03, 2018
Dec. 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 Emerging Growth Company false  
Entity Small Business false  
Entity Common Stock, Shares Outstanding (in shares)   14,956,224
Document Type 10-Q  
Document Period End Date Nov. 03, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Amendment Flag false