Earnings Per Share ("EPS") (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2020	Aug. 03, 2019	Aug. 01, 2020	Aug. 03, 2019
Numerator (in thousands):
Net loss attributable to Christopher & Banks Corporation	$ (15,094)	$ (5,941)	$ (32,332)	$ (12,093)
Denominator (in thousands):
Weighted average common shares outstanding - basic (in shares)	37,693	37,440	37,627	37,686
Dilutive shares (in shares)	0	0	0	0
Weighted average common and common equivalent shares outstanding - diluted (in shares)	37,693	37,440	37,627	37,686
Net loss per common share:
Basic (in dollars per share)	$ (0.40)	$ (0.16)	$ (0.86)	$ (0.32)
Diluted (in dollars per share)	$ (0.40)	$ (0.16)	$ (0.86)	$ (0.32)
Stock options excluded from the shares used in the computation of diluted earnings per share because they were anti-dilutive	4,700	4,800	4,500	4,700