v3.19.1
Document And Entity Information - USD ($)
$ in Millions
12 Months Ended
Feb. 02, 2019
Apr. 12, 2019
Aug. 03, 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 Emerging Growth Company false    
Entity Small Business true    
Entity Common Stock, Shares Outstanding (in shares)   14,924,619  
Entity Public Float     $ 114.9
Entity Shell Company false    
Document Type 10-K    
Document Period End Date Feb. 02, 2019    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Amendment Flag false