Earnings Per Share ("EPS") (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 01, 2020	Nov. 02, 2019	Aug. 03, 2019	May 04, 2019	Feb. 02, 2019	Nov. 03, 2018	Aug. 04, 2018	May 05, 2018	Feb. 01, 2020	Feb. 02, 2019
Numerator (in thousands):
Net loss attributable to Christopher & Banks Corporation	$ (5,088)	$ 487	$ (5,941)	$ (6,152)	$ (11,277)	$ (8,817)	$ (7,426)	$ (5,319)	$ (16,694)	$ (32,839)
Income allocated to participating securities									0	0
Net loss available to common stockholders									$ (16,694)	$ (32,839)
Denominator (in thousands):
Weighted average common shares outstanding - basic (in shares)									37,891	37,492
Dilutive shares (in shares)									0	0
Weighted average common and common equivalent shares outstanding - diluted (in shares)									37,891	37,492
Net loss per common share:
Basic (in dollars per share)	$ (0.14)	$ 0.01	$ (0.16)	$ (0.16)	$ (0.30)	$ (0.24)	$ (0.20)	$ (0.14)	$ (0.44)	$ (0.88)
Diluted (in dollars per share)	$ (0.14)	$ 0.01	$ (0.16)	$ (0.16)	$ (0.30)	$ (0.24)	$ (0.20)	$ (0.14)	$ (0.44)	$ (0.88)
Stock options excluded from computation or earnings per share (in shares)									4,200	3,900