v3.19.3.a.u2
Document and Entity Information - shares
9 Months Ended
Nov. 02, 2019
Dec. 06, 2019
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Nov. 02, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Registrant Name TILLY'S, INC.  
Entity Central Index Key 0001524025  
Current Fiscal Year End Date --02-01  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Class A common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   22,192,592
Common Stock (Class B)    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   7,486,108