Document and Entity Information - shares	6 Months Ended
	Aug. 03, 2019	Sep. 06, 2019
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Aug. 03, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
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		22,050,632
Common Stock (Class B)
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		7,526,108