Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 29, 2017	Apr. 30, 2016
Numerator (in thousands):
Net loss attributable to Christopher & Banks Corporation	$ (3,688)	$ (167)
Denominator (in thousands):
Weighted average common shares outstanding - basic (in shares)	37,090	36,922
Dilutive shares (in shares)	0	0
Weighted average common and common equivalent shares outstanding - diluted (in shares)	37,090	36,922
Net loss per common share:
Basic (in dollars per share)	$ (0.10)	$ 0.00
Diluted (in dollars per share)	$ (0.10)	$ 0.00
Stock options excluded from the shares used in the computation of diluted earnings per share because they were anti-dilutive	4,400	2,200