v3.26.1
Document and Entity Information - shares
3 Months Ended
May 02, 2026
Jun. 04, 2026
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date May 02, 2026  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Trading Symbol JILL  
Entity Registrant Name J.Jill, Inc.  
Entity Central Index Key 0001687932  
Current Fiscal Year End Date --01-30  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity File Number 001-38026  
Entity Tax Identification Number 45-1459825  
Entity Address, Address Line One 4 Batterymarch Park  
Entity Address, City or Town Quincy  
Entity Address, State or Province MA  
Entity Address, Postal Zip Code 02169  
City Area Code (617)  
Local Phone Number 376-4300  
Entity Common Stock, Shares Outstanding   14,951,415
Entity Interactive Data Current Yes  
Title of 12(b) Security Common Stock, $0.01 par value  
Security Exchange Name NYSE  
Entity Incorporation, State or Country Code DE  
Document Quarterly Report true  
Document Transition Report false