Document and Entity Information - shares	3 Months Ended
	May 02, 2020	Jun. 15, 2020
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	May 02, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
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
Entity Interactive Data Current	Yes
Entity Shell Company	false
Class A common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		22,413,589
Common Stock (Class B)
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		7,366,108