Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Numerator (in thousands):
Net loss attributable to Christopher & Banks Corporation	$ (5,319)	$ (3,688)
Denominator (in thousands):
Weighted average common shares outstanding - basic (in shares)	37,297	37,090
Dilutive shares (in shares)	0	0
Weighted average common and common equivalent shares outstanding - diluted (in shares)	37,297	37,090
Net loss per common share:
Basic (in dollars per share)	$ (0.14)	$ (0.10)
Diluted (in dollars per share)	$ (0.14)	$ (0.10)
Stock options excluded from the shares used in the computation of diluted earnings per share because they were anti-dilutive	3,900	4,400