Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Numerator (in thousands):
Net loss attributable to Christopher & Banks Corporation	$ (7,426)	$ (7,889)	$ (12,745)	$ (11,577)
Denominator (in thousands):
Weighted average common shares outstanding - basic (in shares)	37,458	37,156	37,381	37,123
Dilutive shares (in shares)	0	0	0	0
Weighted average common and common equivalent shares outstanding - diluted (in shares)	37,458	37,156	37,381	37,123
Net loss per common share:
Basic (in dollars per share)	$ (0.20)	$ (0.21)	$ (0.34)	$ (0.31)
Diluted (in dollars per share)	$ (0.20)	$ (0.21)	$ (0.34)	$ (0.31)
Stock options excluded from the shares used in the computation of diluted earnings per share because they were anti-dilutive	4,300	4,100	4,000	4,100