Cover Page - shares	6 Months Ended
	Aug. 01, 2020	Sep. 11, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Aug. 01, 2020
Document Transition Report	false
Entity File Number	001-31390
Entity Tax Identification Number	06-1195422
Entity Registrant Name	CHRISTOPHER & BANKS CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	2400 Xenium Lane North
Entity Address, City or Town	Plymouth
Entity Address, State or Province	MN
Entity Address, Postal Zip Code	55441
City Area Code	763
Local Phone Number	551-5000
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	CBKC
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		38,595,316
Entity Central Index Key	0000883943
Current Fiscal Year End Date	--01-30
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false