Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 02, 2019	Nov. 03, 2018	Nov. 02, 2019	Nov. 03, 2018
Numerator (in thousands):
Net income (loss) attributable to Christopher & Banks Corporation	$ 487	$ (8,817)	$ (11,606)	$ (21,562)
Denominator (in thousands):
Weighted average common shares outstanding - basic (in shares)	37,495	37,602	37,755	37,459
Dilutive shares (in shares)	57	0	0	0
Weighted average common and common equivalent shares outstanding - diluted (in shares)	37,552	37,602	37,755	37,459
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.01	$ (0.24)	$ (0.31)	$ (0.58)
Diluted (in dollars per share)	$ 0.01	$ (0.24)	$ (0.31)	$ (0.58)
Stock options excluded from the shares used in the computation of diluted earnings per share because they were anti-dilutive	4,400	4,200	4,600	4,100