Earnings Per Share ("EPS") (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	May 02, 2020	May 04, 2019
Numerator (in thousands):
Net loss attributable to Christopher & Banks Corporation	$ (17,238)	$ (6,152)
Denominator (in thousands):
Weighted average common shares outstanding - basic (in shares)	37,555,000	37,400,000
Dilutive shares (in shares)	0	0
Weighted average common and common equivalent shares outstanding - diluted (in shares)	37,555,000	37,400,000
Net loss per common share:
Basic (in dollars per share)	$ (0.46)	$ (0.16)
Diluted (in dollars per share)	$ (0.46)	$ (0.16)
Stock options excluded from the shares used in the computation of diluted earnings per share because they were anti-dilutive	4,500,000	4,500